Street Hockey
Not my favorite, but a very fun extreme sport. You will need hard wheels so you don't have to buy new wheels every month. Get clear ones that are real cheap like the ones at Wal-Mart. These will be just as good as anything else! Since Street hockey is usually not played in a big area speed is not as important as skill. Stickhandling is the key to street hockey. If you have enough people playing than passing should be used a lot too. If you have about 3 people per team don't have a goalie. Don't have positions. Just play and make sure one guy stays behind the farthest guy on the other team.