When ever I get a group together to play games, I have them pick a barnyard animal I have printed on pieces of paper out of a hat. I make sure I have exactly enough animals and enough per crowd. Example. I have 15 people and I have 5 teams I make sure I have 3 each animal names to draw. After each person draws an animal, they must then make the noise of that animal to find their groups. It is hillarious listening to these people make the soundsto form their teams. You can even name the teams of that animal.