For more casual athletes, sports leagues offer the opportunity to make new friends and sweat a little. But for more competitive participants, they're about winning — and nothing else. If you're somewhere in between, Play Mile High is the perfect league. It offers indoor and outdoor sports and more than 700 mostly coed teams that get into everything from soccer to beer-in-hand kickball. Players never get too serious, but sweat will definitely pour, and after each game, teammates usually meet at a bar to decompress over cold drinks and food. A percentage of the league's registration fee goes toward free sporting events for kids.
Readers' Choice: Edge Old Time Hockey League