You will need at least four players. As the name suggests, play three on one end against one player in the other. You can set up any variety of scoring options:
- Play first to 7 then rotate (regardless of winner).
- Have all start with 7 points. Minus one point for every error. When someone gets to zero, rotate.
- Play 7/11. Trio must get 11 before singles player gets 7.