I have never.. (Extended Version!)
The way this game works is that a minimum of 3-4 people sit in a circle.. There is 1 cup of alcohol. One person says "I have never.." and the event they think someone might've done, and the person/people that have done it take a sip from the cup.
The person that has taken the most sips from the cup appears to be the most drunk, and wins the game of "I have never". At least that's how most people play it.