"Every time you laugh, you must pump your arms back and forth. This inevitably gets other people to laugh how ridiculous it looks and soon everyone is moving their arms which causes more laughing and soon everyone is dead." - Bananajon1
Before we get to the games, though, make sure you play drinking games responsibly. Use low-alcohol-level beverages so you can play longer, and if someone starts to get too inebriated, they should switch to something else (and always have a selection of mocktails available for friends who can't or don't drink). And never, ever drink and drive. These games are intended to be played when you're in for the evening and plan to stay the night.