The players take on the role of a group of friends that are drinking in a bar. Every character must try to persuade the others that they should be the one to buy the next round. But nobody can let anyone buy the drinks instead of them.
Play continues (without coming to blows) until a predetermined time has passed (12 to 15 minutes) when last orders are called. The group then have 30 seconds to unanimously decide who buys the drinks, or the opportunity is lost.