Though feeling the burn during a workout is generally a good sign, feeling the burn while sitting on the sofa means your sofa is in the fireplace. Engage in controlled, constructive body burning with today's Groupon: for $99, you get a three-month membership to The Wellness Center at Northwest Community Hospital in Arlington Heights (a $300 value).

The Wellness Center brandishes a glass-enclosed pool, a well-stocked cardio center, and a slew of interactive, sneakers-on classes. Fit gatherings take place seven days a week, with more than 100 complimentary selections, including Zumba, flexibility, boot camp, and classes oriented around underwater sandcastle smashing. Specialty classes accommodate serious sports enthusiasts, seniors, and exercise aficionados with physical limitations, and aqua-fitness sessions take full advantage of the 25-yard glass-enclosed pool. A free goal evaluation—available to all members—guides muscle-mongers toward healthy targets.

Modern form meets practical function throughout The Wellness Center. Natural light illuminates the fitness floor, which is home to more than 100 pieces of cardio equipment, such as ellipticals, stair climbers, and recumbent and upright bicycles. Likewise, the center's full-service locker room glimmers with perks, including toiletries, towel service, oak lockers, and steam rooms that cleanse bodies faster than soap on a rope on a zip line.