Healthy families are less likely to get in heated arguments over who ate the last Twinkie or who's going to lift the couch so the others can search for lost Twinkies underneath it. Turn arguments into high-fives with today's Groupon: for $99, you get a family fitness-and-tennis package for two adults and any number of children, including a two-month fitness membership (a $100 value/month), two group tennis lessons (a $70 value/lesson), and a 10-class pass (a $100 value) to Lakevue Athletic Club in Valencia (a $440 total value).

Lakevue Athletic Club members can limber up on machines in more than 11,000 square feet of gym space or can take to 11 indoor and outdoor courts to hone their strokes with tennis pros. A two-month family fitness membership gives kinfolk free rein of Cybex, Star Trac, and Hammer Strength fitness equipment so parents and offspring can support each other's efforts to increase endurance, learn health-conscious habits, and build muscles like a father builds a Boy Scout's Pinewood Derby car. Then, use the 10-class pass to stretch, spin, and dance alongside other exercisers in a smorgasbord of 15 sessions, such as cycling, Pilates, and Zumba. See the class-pass and group-exercise schedules for more details.

During two group tennis lessons, professional racket wielders lead clans through a review of fundamentals and drills tailored to their individual skill levels. After the sessions, family members brag about their newly minted swing to a computerized analysis machine, which examines their speed and trajectory and politely tells them to picture the faces of the rival family across the street on the ball.