At age 54, Esther Goldberg has danced in front of 46,000 people at a sold-out Phillies game and behind a casino bar wearing little more than a see-through mesh shirt over a sparkly bra.

This is what Zumba can do to an otherwise mild-mannered masseuse and yoga instructor from Northeast Philadelphia.

If you have not yet heard about Zumba, Goldberg and more than 500 other certified instructors located within 25 miles of Philadelphia’s Center City will clamor to tell you how the Latin-inspired dance fitness phenomenon not only can get you in shape, but truly change your life. As Goldberg put it, “You never know where it will take you.”

Sound a little cultish? It is.

I can say that because I, too, fell prey to the Zumba addiction and have been teaching it since February 2010.

Since there is nothing inherently Jewish about Zumba, I had not considered it newsworthy for a Jewish newspaper until a fellow instructor began ticking off names of members of other Jews among our ranks.

Her point was confirmed a few months later when I posted a query for Jewish instructors on our Philly Zumba Instructor Network Facebook group. Fifteen people responded, generating a string of more than 40 comments that included lots of “oys” and a suggestion to form a Jewish burlesque group.

Short of these anecdotes, there is no data to indicate whether Jews comprise an unusually high share of Zumba enthusiasts. There also is no denying, however, how much this fitness frenzy has reached into local Jewish communities nationwide.

In Philadelphia alone, aside from Jews who have made Zumba part of their weekly routine, at least six area synagogues have added classes to their lineup of community programs. A few teachers have even given it a Jewish twist, infusing Israeli music, Yiddish humor, and their background in folk dancing to guide participants through the moves.

Although Zumba seems to be a relatively recent fad in the Northeast, it has been around in other parts of the country for years. Last July, a crowd of more than 6,000 instructors marked its 10th anniversary at a sold-out convention in Orlando, Fla.

Of course, Zumba has evolved quite a bit since 2001, when creator Beto Perez, a Colombian aerobics instructor living in Miami, pulled out some salsa music he had in his backpack as a desperate substitution for the formatted fitness tracks he had forgotten.

In 2005, Perez began licensing instructors to bring his format to their local health clubs. Instructor training and classes soon began cropping up here and there, according to fitness professionals. Today, Zumba has morphed into a kind of international cultural showcase, with “12 million people of all shapes, sizes and ages taking weekly Zumba classes” in over 110,000 locations across more than 125 countries, according to the company’s website.

Goldberg found Zumba, with its loud, quick, “out there” moves, to be a perfect counterbalance to the other forms of dance and yoga she had been teaching since she was a teenager. What began as one class at a suburban Philadelphia synagogue quickly expanded to four.

“People like to move their bodies, but often feel like they can’t dance since they didn’t have training, or they feel self-conscious,” Goldberg said. With catchy music and repetitive steps, “Zumba eliminates that.”

Because of the Jewish setting, Goldberg continued, it is easy to throw in “Hava Nagila” or other Jewish songs, talk about upcoming holidays, or joke about how much everyone ate at Chanukah.

“My name is so Jewish, it’s like I’m more comfortable fitting in,” Goldberg explained. “It’s like heimische. Especially if they are members of the synagogue, it’s like, ‘Wow, I can come to my synagogue and work out, it’s here.’”

The phenomenon represents a shift for synagogues wanting to be seen as community centers, not only houses of worship, said Robert Friedman, the executive director of the suburban synagogue at which Goldberg struts her stuff.

“We’re here anyway, so why not have the building open for different community needs,” he said. “We like to think that it helps us when people come here and have a good feeling: ‘I bring my kid for preschool and I play mah jongg and I do Zumba, yeah, maybe I should join here.’”

Growing up, instructor Donna Harris just wanted to dance on Broadway. “My Jewish mother wouldn’t hear of it,” said Harris, 62.

So instead, she attended Temple University and became a teacher. After retiring in 2008, the “frustrated dancer” finally got her chance to cut loose. “While many of my friends went to Hadassah meetings, knitting circles, and mah jongg games, I was Zumba-ing like there was no tomorrow,” said Harris, of Northeast Philadelphia.

The best part, she said, was seeing the older population she targeted coming out of their shells during class. “Whatever is going on in their lives,” Harris said, “Zumba helps them deal with it.”

She can relate to that. Instead of dwelling on ailments that threatened to slow her down — cervical cancer, depression, a non-malignant brain tumor, emphysema, and severe hearing loss — she concentrated on dancing.

Darcy Silvers, a copywriter and instructor from Holland, Pa., said she would not be surprised if the fact that she grew up listening and dancing to Hebrew songs made her quicker to hop on the Zumba bandwagon. Plus, she said, the format is similar to Israeli dancing — both associate each part of a song with a unique movement.

“To me it’s like perfect because I get paid to exercise,” Silvers said, adding that it is also a great way for women approaching menopause to help stave off weight gain and some of the other side effects that come with that stage of life.

Silvers, 52, incorporates Israeli music in all of her classes — including those at three Curves gyms. At Chanukah time last year, she choreographed a routine to the Yeshiva University a cappella group Maccabeats’ “Candlelight.”

As much as she loves Zumba, Silvers said, it troubles her that synagogues seem more interested in starting Zumba programs than Israeli folk dancing. She is not the only avid folk dancer, she and fellow instructor Beth Ladenheim, also 52, still frequent folk dancing almost every week, and a handful of their fellow dancers attend Zumba classes, too.

In folk dancing, Ladenheim said, the choreography tends to be more intricate and less athletic. She wanted to sweat, and Zumba certainly made that happen.

“As someone who loves to dance, but not exercise, it seemed like a godsend to me during a time when I was desperately trying to lose weight.”

Although Zumba classes tend to attract mostly women, men are specifically banned from the sessions Ladenheim holds at two Orthodox synagogues in Philadelphia.

For Orthodox women who do not belong to coed gyms for modesty reasons, “they would never do this anywhere else,” Ladenheim explained. “I kind of feel like I’m doing a service by going into the synagogue and giving them an opportunity to do something that everybody else is doing.”

Student Beth Gottfried said the class probably played a role in her losing some serious pounds. Aside from the fact that she cannot attend other classes where men might show up, Gottfried, 52, said it was just convenient to have an option at her shul, where she could see friends and meet other Jewish women. “There was no pressure to be perfect; you could mess up and nobody would judge you,” she said.

Students point out that the synagogue classes tend to attract an over-40 crowd, which makes it less intimidating than a gym full of young, athletic exercisers. There are plenty of younger Jews in the mix, too, however, such as myself and 27-year-old Nicole MacDonald, an instructor from Willow Grove. “Zumba doesn’t judge based on age, weight, gender,” MacDonald said. “It’s for everyone.”

Kate Nolt, a fitness consultant seeking a doctorate in kinesiology (the study of human movement) at Temple University, said she expects interest in Zumba eventually will die down as have other fitness trends. Still, she agreed with Goldberg, who insisted that there are “too many people who love it and instructors who love it” for it to disappear soon.

Zumba seems to have reached a new level of fun compared with other workouts, Nolt said.

“It really does touch to the core of a lot of people,” Nolt said. “Some people may not go onto a dance floor at a bar mitzvah, or even a wedding, but in Zumba they’re in a room with a whole bunch of people exercising and it feels really good. They’re dancing, but it doesn’t even feel like a workout.”

Not only does Zumba improve posture and figure, Ladenheim says, the social nature of it “leaves you feeling happy and wanting more movement instead of more cake.”

Or, in my case, more movement and more cake.

JTA/Philadelphia Jewish Exponent