Right I'm going to dare a few people in this thread to go out and talk to someone at the weekend and get a number.
Well mainly if you smoke, situate yourself near a group of people, listen in on their conversation a little bit and then go "I dont mean to be eves dropping but yada yada" inline with something they are talking about, then direct conversation towards your chosen one say something like "sure you look like a chap/girl that would...."
Then if they get up to leave, just say hey "would you like another smoke, all my friends are gone inside" In these recessionary times free ciggerettes might be a good thing. Then ask them if they want to dance. Then just ask them for there number.
Hey presto.