The game is set-up with 10 cups, forming a triangle, on each side of a ping pong table or something similar. The best place to get these cups is from on of the Esquires around town. Do not feel discouraged if you end up going to several before you find one that will sell you the cups for around 50 cents each. Make sure to keep the cups, clean them and what not so this process does not have to be repeated.
The game begins by pouring 2-3 beers evenly into the cups so that each cup is about 1/4 of the way full of beer. Each side begins with one ping pong ball and on the count of 3 one person from each team will shoot while not breaking eye contact with the other team mate, this is like the "kick off" for the game. First team to make it into a cup begins. Both team members throw the ball into the cups of the other opponents. There are a few different outcomes for what may happen.
1. If both members miss it is the other teams turn.
2. If one member makes it the other team has to pull and drink that cup.
3. If both team members make it both cups are pulled and consumed and the team that made it gets to go again.
4. If a ball is bounced and goes into a cup then 2 cups need to be removed and consumed. (Once the ball bounces the other team may defend their cups by slapping the ball out of the air but only after it has bounced)
5. If both balls are bounced and go in then 4 cups must be pulled and consumed and the team gets to shoot again.
There are 2 "re-racks" which enable each time to have the cups repositioned to make it easier to shoot, this is most commonly done when there are 6 cups remaining and are put into a smaller triangle or when there are 4 cups left making a diamond.
The game continues until there are no more cups and the winning team stays on the table to play the next opponents.
There are many other rules that people play by but these are the most simple and straightforward so feel free to elaborate and get fancy with it. A fun way is to make one cup entirely filled with beer. Another rule often played with is that if you sink a ball into the cup that the other team is drinking while there is still beer in it the game is over and the team that made it wins. Another rule is that if after you shoot and miss the ball rolls back to your side you can shoot it behind the back and it counts as a real shot.