Gyms were introduced in ancient Athens to appease the gods with chiseled frames and provide shelter for feral Stairmasters. Celebrate this advancement with today's Groupon: for $20, you get a one-month Fit J gym membership to The J Sports and Fitness Complex of Dallas, Texas (up to a $54 value, depending on age).

The J welcomes everyone, regardless of age, background, or sleep score, to enjoy more than 100,000 square feet of activity space. Members receive full access to top-notch workout equipment in addition to three basketball courts, eight lighted tennis courts, and an indoor swimming facility furnished with a lap pool and warm-water exercise pool. Feel free to liquidate your toxic assets in the sauna, flush clogged pores in the steam room, or miniaturize big-budget disaster films in the whirlpool. Membership includes enrollment in personal training and fitness classes, varying from tai chi to Muscle Activation Techniques, a course designed to identify and help strengthen weak muscle systems.