So maybe you’re feeling a bit lazy and just want to start drinking without setting up a complicated game and explaining rules.
Try this:

1. Get a quarter and find a flat surface like a coffee table or a desk.

2. Half the people call heads and the other half gets tails (don’t recall after every turn, just stick with one or the other for a little while).

3. Have people take turns spinning the quarter. Just hold the quarter standing up, balanced with one finger on the top. Flick the quarter from underneath your finger
and watch it spin.

4. If it lands on tails, the people who got stuck with that have to drink. If it lands on heads, people who called heads have to drink. Have fun.

The End.