Although body-exchange programs mean no one ever has to stay in one meat suit for long, returning yours in bad condition means you forfeit your deposit. Keep your constitution in returnable condition with today's Groupon: for $10, you get 10 fitness classes at any of Merritt Athletic Clubs' nine Baltimore-area locations (a $200 value). With upward of three decades of blasting abs and toning triceps under its belt, Merritt Athletic Clubs helps its more than 27,000 members stay fit and fetching by stocking each facility with expert instructors and premium equipment. Build your carcass-carving curriculum by choosing from more than 300 weekly classes designed to coat your body in a protective layer of sweat that will leave it invulnerable to airborne calories and fattening laser cannons.