Some people. And as the title suggests, beer!
To start with, each player must have a full pint of beer.
The rules are very simple! All players must start to down their drinks at the same time. When the first player has completely downed their pint, he/she must turn the pint glass upside down and place it on their head.
When this has happened, all remaining players must follow suit and do the same, even if they have beer remaining in their glass…! You see how this gets interesting?!
In no place in the rules does it say the pint glass has to be empty for the first person to put it on their head.
If you want to make it a bit more interesting, why not make it 2 or 3 pints before