"Only if we’re doing 'Toxic' for the cool-down!" someone yelled back.

The class moved in a wave of neon leggings and glittery sweatbands. During the bridge, where Britney pleads for her "only wish" to come true, the choreography shifted into high-intensity . Every time the chorus hit— "He's all I want, just for me" —the room erupted into a synchronized sequence of high-kick pivots and shimmy-shakes that worked the core and the spirit in equal measure.

"Same time next week?" Maya asked, wiping sweat from her brow.

The studio mirrors were already fogged with the heat of twenty bodies as the opening bells of Britney Spears’ chimed through the speakers.