Casino themed 16th birthday party ?

im having a casino themed birthday party for my 16th birthday. i have almost everything figured out, like games, (blackjack, poker, craps, ) ...(say anymore games you have in mind)... and such. I also have prizes for the girls, (bath and body works stuff, and some cosmetics). foods all set, my moms gonna have it catered. im going to have about 25-30 people come. one of my problems is, i have no idea what to give out as prizes for the guys. and i really want to make it enjoyable for everyone, so any creative contests between the people ? like i read someone did a contest for best "poker face" and all. anything that can help ? please and thank you :)