Give each person in the room a letter (or multiple if need be), so that every letter is represented once. Then, give each person a blank sticky label on their hand, and a pen. The aim of the game is to be the first person to have your name written on your sticky note. To get a letter for your name, you must find the person who has that letter, and they can then write that letter on your sticky label with their pen.

Pens Sticky labels