Every person should have a chair except one person. The chairs should be set up in a circle facing the middle. The person without the chair will start. He/she will say something true about him/herself (I am wearing a blue shirt, I have a sister, etc). If this is true for anyone else sitting in a chair, they must get out of their seat and find a new seat. The person in the middle who was just in the middle is also trying to find a seat. The last person who does not find a seat turns into the person in the middle. The tricky part is that you must move at least two (or three, depending on the size of your group) chair over. You cannot move over just one chair.
This game can last as long or as short as you want it to.