LOS ANGELES

AROUND 11:40 a.m. every Sunday, they arrive at Foresight Studios, a rehearsal and performance space in the heart of Silver Lake, a hipster neighborhood in Los Angeles. They wear pink leg warmers, sparkly headbands and the type of tiny shorts not seen since Richard Simmons felt the burn in them in the 1980s. They are here for Sweaty Sundays, a dance class taught by Ryan Heffington, a choreographer, performance artist and designer with a soft spot for Lycra and bright pastels.

Here, members of this creative class  artists, photographers, fashion designers and screenwriters  dance off the previous night’s excesses to a soundtrack of indie rock, techno, and 1980s new wave hits. And they do it while looking fabulous in Jane Fonda leg warmers and belted leotards.

“It’s kind of an American Apparel ad come to life,” said Terence McFarland, 40, the executive director of the Los Angeles Stage Alliance, who is a regular.

On a recent Sunday, Christopher Kreiling, a 33-year-old visual artist, was among the first to arrive. It was his first time, but he already had the look down: a pair of very short white corduroy shorts, a pink-and-white striped tank top and the all-important headband.