It's high energy, fun cardio and crazy calorie burning for those who give it a go.
"So much fun, you feel like you're on stage because everyone's watching," said DJ of West Hollywood.
Instructor and choreographer G Scott takes his students through the paces of the greats: Madonna, Lady GaGa to name just a few.
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"This week is our Janet Jackson week," Scott said.
Scott says moms, former dancers and a lot of wanna-bes come together to master the iconic moves. Everyone is invited.
"There is a woman who takes my class that's 69, and she knows every single piece of choreography that is taught better than the 20-year-old. So I'm like, go granny," Scott said.
DJ loves learning the moves and trying them out at clubs, but he thinks practice at "this" club rocks too.
"It's not about being a professional. It's not about being good. It's about having fun," said DJ.
If Videography isn't your thing, Crunch also offers Zumba, X-Pole dancing and Burlesque.
Crunch offers a free guest pass that is available on the gym's website.