I am not sure this is groundbreaking, but it's a lot of fun and is MUCH better than go-around-the-room-and-talk-about-yourself for an icebreaker. Make name tags with several very prominent celebrities (widely-known celebs who would be known by different age ranges, residents of different areas, etc. Ex: include people like Madonna, Roseanne, Charlie Sheen, don't include 50 Cent, Honey Boo Boo, Khloe Kardashian). A leader sticks the nametag on to the center of each person's back. Divide them into small groups (like 4-5 people). Give prizes--first, second, and third--for the first people to figure out who they are. You find out by going around and asking other people identifying questions like, "Am I a TV star?" "Am I a singer?" etc.