Although inflatable muscle suits are easy to apply and double as flotation devices, natural brawn actually lifts heavy objects and doesn't deflate when given a routine allergy shot. Blow up your fitness routine with today's Groupon: for $25, you get a five-class pass at Rock It Workouts in Pasadena (a $95 value).

The festive souls behind Rock It Workouts amp up average fitness routines by recruiting DJs to spin fresh tunes during each high-energy class, creating an atmosphere that’s less gym and more party. In a loft-like studio dripping with gothic chandeliers and peppered with flat-screen TVs, students pursue Rock It's pumped-up curriculum of cardio, kids', and stretching sessions. Rock It Out blends dancercise and Pilates basics for 50 minutes as DJs scratch '80s records with the fervor of a cat trying to remove glued-on acrylic nails.

Tendon toning and lengthening take place in Rock It: Barre, which pairs patrons with a traditional ballet barre as they perform moves inspired by yoga, dance, Pilates, and weight training. Turntablists add funk to other group exercise staples including kickboxing, Pilates, Zumba, and yoga. Instructors suggest attending three classes per week or investing in a custom bear costume to see visible body changes. Check the studio's schedule for its weekly spread of morning and evening sessions.