Pop The Top
Rules: Every player sits around a table with a glass filled with their drink of choice.
I DO NOT recommend straight spirits, beer will do just fine. In the center of the circle of glasses is an extra filled glass, the bastard cup.
The aim is to take the bottle tops from the the beers and flip them into the players glasses, every time you land a top in a players glass the owner of the drink must chug it down no questions asked.
If the tops land in the bastard glass, every player must drink and the last to finish chugging must chug the bastard glass on top of their first glass.
Not exactly hygienic but i have seen some seasoned drinkers a bit trolleyed after a few quick rounds.