Last week, Mark Fisher Fitness came up with an off-beat fundraiser for the upcoming Broadway Bares burlesque revue: “I Love the 90s” saw trainers and clients singing hits from Spice Girls, Alanis Morisette, Seal, Gwen Stefani and other pop stars of the Grunge Decade.

The boutique gym isn’t exactly your usual sweat factory: The owners believe the key to a positive health is careful coaching and a fun program designed in an inclusive atmosphere.  Trainers are often over the top, like drag queen Chelsea Piers (above, left) who teaches the popular “Ninja Essentials” classes..

On June 5, Mark Fisher’s large-scale Unicorn Jamboree benefit kicks off at Industry. The evening will be an evening of charity, debauchery, and sexy unicorns benefiting Broadway Cares/Equity Fights AIDS, the New York theater world’s response to the AIDS epidemic.  Visit the Mark Fisher Fitness site for more details. 

Click through for more pictures from “I Love the 90s”

Photos: JJ Keyes