It's simple, but great. (You really have to play a round or two to understand all the subtleties of this game.)
A similar version is as follows: Each time a sip is taken, a quarter (or suitable ante) is tossed into the pitcher by the drinker. Whoever chugs the pitcher dry, i.e., drinks for dollars, collects the loot. It could be advised to use nickels vs quarters as, when swallowed, they tend to pass through the digestive system easier.
These and many other gnarly beer games are described in the two book series "The Complete Book of Beer Drinking Games", written by three Yale students. The first one is better, very entertaining.
Game source: The (Un)Official Internet Bartender's Guide
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