How to Play Beer Pong - Regular Beer Pong Rules

Setting up your Beer Pong Table

Arrange cups in a pyramid formation, 10 on each side (as shown below). Fill each of the cups with beer to a similar height.

Note: It is up to you how much beer you put in each cup to begin the game. The average game is usually played with 3 bottles of beer evenly distributed amongst the 10 cups at each end of the table. This should fill the cups approximately 1/3 of the way up. You may want to add more or less beer depending on your drinking ability. Whatever you decide, it should be a consistent amount poured into each cup on the table.
 
If you choose to play beer pong as a game of skill rather than a drinking game pour some water into each cup instead of beer. This will weight the cups down and prevent them from easily being knocked over during play.

Beer Pong - 10 cup formation for full length games

Beer Pong - 6 cup formation for shorter games

How to play 

Beer pong is usually played in teams of two with two balls (1,2 v 3,4).  Players 1 and 2 start with a ball each. They then throw the ball across the beer pong table, trying to land the ball in one of their opponent’s cups. When a ball lands in a cup, one player from the opposing side must chug that cup, and then remove it from the beer pong table. If both players on the same team sink a cup in the same round, they get the balls back and get to shoot again.
 
Drinking is alternated. One player drinks the first beer cup, the other drinks the second, the first player drinks the third, and so on. Throwing can either be alternated or done two at a time.
 
Bouncing counts as two 

If a player is able to bounce their ball into a cup, then two cups must be consumed and removed from the table. Bouncing a ball in is harder to achieve then sinking a ball on the full, because as soon as the ball touches anything, including a cup or the beer pong table, it's fair game to be grabbed or swatted away. If a player touches the ball before it has come in contact with a cup or the beer pong table that player has fouled and must drink and remove a cup as a penalty.
Re-racking 

Each team is able to change the formation of their opponent’s cups at any point, twice throughout the game. For example, if a team has only four cups left on the table, they may ask for them to be regrouped into a diamond shape. If they have only two cups left on the table they may ask for them to be pushed together in a line. Each team only gets two re-racks so they should be used at strategic times throughout the game.

 
Winning the game and rebuttal 

When a ball is sunk in the last cup on a side, the losing team has the opportunity to match (this is known as the rebuttal rule). Their team gets one or two balls depending on whether or not the winning team used both shots to sink the final cup or cups. If the losing team manages to clear all of the winning team's cups while matching, three new cups of beer are added to each end of the table in a triangle and play continues.

When a team has sunk all of their opponent’s cups and their opponent is not able to match during the rebuttal rule, that team is declared the winner. Any cups of beer left on the side of the winning team must be consumed by the losing team.

 
House Rules

Some common house rules that you can choose to add to the game are as follows.

Girls Blow - Guys Finger

If the ball is spinning around the rim of a cup and not yet touching the liquid, female players can attempt to blow the ball out of the cup before it touches the beer. If they successfully blow the ball out of the cup before it lands in the beer the shot does not count and play continues with the cup remaining on the table. Males are not allowed to blow, instead they are able to attempt to remove the ball from spinning around the cup by flicking it out with one finger in an upward motion. Again if they are successful the shot does not count and play continues.

Streaking

If one team didn't make a shot for the entire game, first they finish the other team’s beers. Then they proceed to take off their clothes and streak 1 full lap around the house/apartment.