Young Girls Playing Beer Pong

Game play
Traditionally, the game of beer pong has been played by countless variations of rule sets. In recent years, organizations such as The World Series of Beer Pong have put forth "official" rules. Typically, players abide by a uniform set of "house rules", which are often consistent within one university or region of the country (e.g., "Ivy League rules" or "West Coast rules"), or may vary on a "house-by-house" basis. Number of cups, bouncing, amount of alcohol, the distance shots must be taken from, et cetera, may all vary. All house rules must be either posted or verbally stated and understood by both teams before the game starts. If neither happens previous to the game, the game in progress should be ruled by official beer pong rules.
In some house rules, players must immediately drink any cup that has been hit. Failure to do so incurs a penalty, such as drinking more beer or losing the game. Some rule sets allow for "re-racking" (also known as "reforming", "rearranging", "consolidation", and other names), which is a rearrangement of a team's remaining cups after some have been removed. The formations, number of cups, when to rearrange and so on depend on the rule set. For example, a team with three remaining cups may ask the other team to "re-rack" their multiple targets into a single triangle formation.