People ready to drink, beer, and a whiffle ball bat or something to hit with.
Pour a beer into a cup. This is a one person at a time game.
One person chugs a full beer while everyone else counts how long it takes to down the drink.
The person who just finished the drink must now put one end of the bat to the ground and the other to their forehead and spin around the bat once for every second it took drink the beer.
After spinning someone tosses an empty beer can to the drinker and they must hit it with the bat or start all over. After hitting the can someone else can step up to bat.
It's probably best not to play this game where anything can get broken. Apart from that, there are no more additions for this game. Can you think of any?