Pictionary is a fun party game for any occasion. It's similar to charades , except you don't act out stuff, you draw them on paper.
So... like in charades, you can play it in teams or every man and woman for him/herself. The basic idea is that someone draws something on a piece of paper and others guess what he's drawing.
Divide yourselves into two teams. One person from a team draws and the rest try to guess in a set period of time. If a team guesses correctly before the time runs out, they get a point.
Each person draws once and all the rest guess. Whoever guesses first gets a point.
You can pre-set some things to draw, write them on a piece of paper and have each person draw what they will draw:)
A more common way is for the opposite team to pick what the other team will draw, or the last one to draw to pick something for the next person. Be sure to set some rules on what is allowed, otherwise you might get some pretty impossible things to draw.