PLEASE HELP FAST....

Hey, I am Krystal, and I do these huge parties twice a year, one for my birthday, and one for the end of the school year. My end of the school year party is coming up really soon, and I am trying to think of some games to play. The party is both boys and girls, we are ages 15-16, and the boys normally go home around midnight! My friends really, really enjoy the M-E-S-S-Y games! So please if you could think of some games really really quick, I would greatly appreciate it.
Thanx----Krystal