CORAL GABLES, Fla. — On a rooftop parking lot, with temperatures in the chilly low 50s, a crowd of all ages shimmied and shook, sweated and smiled as DJ Francis played an eclectic mix of dance music. But this wasn’t just another wild South Florida party. It was a special Zumba class for charity, led last month by the creator of the global craze, Alberto “Beto” Perez.
