Equipment needed: Plastic cups
Divide the group into two teams with equal players on each team.
Fill some plastic cups with beer or another drink.
On the count of three, the first two opposing players drink their cups. When they finish, they place the empty cup on the edge of the table and try to flip it upside down using their fingers.
If it lands upside down on the table, the next player on the team can start drinking. If not, they need to keep trying.
The team that finishes first is the winning team.