There are many ways you can use this Whose Round Is It Anyway "Simon" game from Gadgetz4all. You could decide that the first person to incorrectly repeat the sequence of colored lights has to buy the next round. You could also use it to decide who's going to take the next shot.
Hell, you could even use it to determine which unlucky son of a bitch gets to go home with the fat one. Take it for the team, Steve. Take it for the team.