Typically, the Good Mews cat shelter in Marietta, an Atlanta suburb, with its bright walls and white volunteer-scrubbed floors, is home to 100 or so cats who lounge and chase and bat at the odd toy, all while they wait for humans to come find them and give them a forever home.

Tonight, however, they are in for something special. Tonight, their home in the cage-free adult cat room transforms into a studio for the ultimate in challenging exercise fads. Classes have popped up on New York’s Lower East Side, in San Francisco, even in Des Moines and in Mobile, Alabama.

Tonight, it’s yoga with cats.