Put down famous people on strips of paper. You put the strips of paper in a bag and everyone draws one and without looking tapes it to their forehead. Everyone else treats them like that person throughout the night and the first one to guess who they are wins!
One great party game is Props. Split your guests into teams. Each team gets a box of random objects, they then have to use those objects in a scene, or for a funny purpose. There is no real winner, it's just a ton of laughs. Telephone is a old favorite, see how wrong everyone gets it! Twister, another classic.
Pin the tail on the donkey, Twiser, Jenga, any board game like Trouble, Operation. Or for an older party, Strip Poker, Kings, Drunken Sherades, kareoke, pictionary, or any adult board games
Depending on the type of party you are having there are many differnt types of fun party games. At a baby shower you could do a baby food tasting, taking the baby food labels off of the jars and having the guests taste and guess what kind they are eating.