I've just read in The Guardian that "more than 400 teams worldwide now play Muggle Quidditch by the rules of the Intercollegiate Quidditch Association, including squads from Harvard, Yale and MIT." Amazing! Apparently all you have to do it find a cross-country runner to be the Golden Snitch and get everyone else to play the game with broomsticks between their legs. Watch this:
Read the rules of the game here.