Foursquare is the new Dodgeball MAR 11 2009
Users rack up points based on how many new places they visit, how many stops they've made in one night and who else has been there. You become a "mayor" of a hot spot if you're there often. [...] "People get kind of competitve about this." There's a "Leaderboard" which lists the most adventurous users with the most points.