I Need Help! IM DESPERATE

Hey everyone!
Im having a party for my best friend (she`s 14) and it`s for mostly guys cuz we dont really have "GIRL" friends we just hang with the guys and of couse our boyfriends too! but i really have NO idea what to do... But i need it to be something we can do at night indoors! not messy though! please help me i would really appriceate it!
Lauren