Like tug-of-war tournaments and harmonized singing telegrams, workouts are more effective when done with a group. Join a fitness community with today's Groupon: for $20, you get a 30-class Yoga & Fitness pass from MetaBody (a $350 value). This Groupon is valid at 23 New Jersey locations. MetaBody will donate 10% of its Groupon proceeds to diabetes research.

The inspiring trainers at each MetaBody location lead troops of workouteers in results-oriented workouts several times weekly. Sweat sessions utilize a variety of exercises and disciplines to produce full-body results in a supportive environment, ideal for beginners and hard-core core hardeners alike. During any class, motivational instructors will use the instinctual distrust of routine to their advantage. Begin the day with a refreshing yoga class or wind down by burning calories with an evening boot-camp session.

Muscles are kept guessing with new and challenging moves as well as the occasional heart-pumping round of “What’s My Line.” In addition to the fitness classes, students receive a success guide to help to prepare them for imminent pound loss, a nutrition guide, and a $100 gift certificate for individual coaching from MetaBody’s team of certified nutritionists. Because the pass sets a 5- or 10-class cap at any given location, roving fitness mavens can further shake up their workout regimens by vetting a series of classes or instructors that work best for them.