Without sports, arenas would only be used to hold contests to see who could sit quietly the longest. Enjoy your right to indoor athletics with today's Groupon: for $35, you get six kids' sports training or adult fitness classes (a $90 value) at TCG Arena in North Richland Hills, home of the Texas Outlaws professional indoor soccer team. Today's deal is valid for all one-hour classes in the fall, winter, and spring.

TCG Arena keeps all ages active with its indoor sports facility and a seasonal schedule of classes in flag football, soccer, and fitness boot camp. Kids ages three-and-up can finally circumvent mom's "no kicking balls indoors" directive by deliberately kicking, passing, dribbling, and slam-dunking balls with their feet during instructional soccer sessions. Youngsters leaning more toward football than futbol can partake in flag football instead, which teaches the fundamentals of the frequently commercial-breaked sport, through drills, games, and professional tips on how to dab super glue for extra flag snugness and player smugness.

Post-children and/or two children stacked on top of each other can get more adult-oriented exercise during The Texas Outlaws Boot Camp (Monday, Wednesday, and Friday, 5:30 a.m. to 6:30 a.m.)—a soccer-centric, one-hour workout for all skill levels that improves speed and agility and develops the foot and leg coordination necessary for picking up Brazilian suitors at speed dating conventions. The winter and spring schedules come out up to six weeks before classes start, so if you don't sign up for any of the sessions starting the first week of September, mark your calendar and check back on the TCG Arena website for more information. Call ahead to schedule your class sessions.

All six sessions must be redeemed consecutively.