Today's side deal teaches you to serve your fellow man: for $19, you get one registration to play in the Monday and Wednesday sand-volleyball league of Fatso's Sports Garden North (a $45 value). No man is an island—especially a flat, sandy island with a net stretched across it—so nab multiples to form a two-, four-, or six-person team. This Groupon is valid at Fatso's Henderson Pass location only.

Putting together a volleyball squad is not only a fantastic way to sweat out excess undigested burgers, but it will also help you meet new people and exercise your competitive drive. The games begin Monday, May 17, or Wednesday, May 19, and last for seven weeks, including playoffs. Depending on the turnout, there will be up to three games a night, with the first starting at 7 p.m. and the last wrapping up by 10 p.m. Your Groupon covers the entire season, so the normally required deposit fee is waived.