Supplies: cans of beer, a box or bag, some thirsty people.

Take one can of beer and shake the shit out of it. Till it's about to blow up. Then put it in the box or bag with the others and mix them around (one person not looking) so nobody knows where it is.

Now, one person picks a can, holds it to his/her head at an angle, and opens it. If it's not the one, s/he has to drink it and the next player goes. If it is the one, s/he gets a wet head and is out of the game. Start the next round again with the remaining survivors. The last remaining survivor wins and should be drunk with a dry head.