The only way to play a pickup game: five-on-five full court to 21, switching at 11, and win by two. Oh, and call your own fouls...pussy.
I've never seen someone flop in a pickup game though, but that'd be hilarious. My biggest pet peeve on the court are the foos who think they got the Eurostep down, when in reality, they're racking up frequent flyer miles with all that traveling. As Bill Russell once said, "The game has always been, and always will be about buckets."