Equipment needed: Glass, coin
This is a nice and easy game that just requires a glass and a coin, like a quarter.
Place the glass in the middle of the table. To play, each person places the coin on the edge of the table in front of them. The trick is to attempt to flip the quarter into the glass. Those that succeed can choose one person that has to take a sip of their drink.
The person that succeeds also becomes the rule-maker and can implement any rule they want. «No one can say cheers» and «no questions can be asked» are rules that can be implemented.
If a player violates the rule, they have to drink. The rule is valid until another player lands the coin in the glass.