This is by far my favorite drinking game!  I can understand the need for tryouts...you don't wanna have someone on your team who needs like 10 tries to get the cup flipped!  You also don't wanna a girl on your team who doesn't chug the beer but instead drinks it nice and girlie like!  You need the true, hardcore, flip-cup player!!!!!  The same applies for the guys.  Sometimes people just flat out suck at this game, even though you think they'd do better.  Anyway, have a good time and good luck! 
