You must own or construct a Shut Box or Shut-the-Box game. It's a rectangular box with sides so you can roll dice in it. There are tiles for each number, 1-9 (or 1-12). You roll two dice, total them, then flip/shut any combination of tiles equal to the total. Your turn ends by flipping all tiles (a shut box) or when your total equals numbers that you no longer have available. Sum the numbers of the remaining tiles, and this is your score (low is good). These are the same rules as the real game. The bar twist: Get a group of people and each take a turn. Highest total buys shots for the group. Repeat as needed. Quick drunk. Simple.