Honestly, I would not have the alternate pay. I would set a team price, and they pay it. If only three people are on the team, then they split it three ways, if four, then four ways. Let them figure out if they want to do three people with an alternate, or if they want to rotate who plays, like in game 1, #1, 2, and 3. Then in game 2, #2, 3, and 4. The funnier it is, the better people like it and not only want to continue, but tell others about it.