Coach gives free balls to entering side. If the winning team gets three out of five before the entering side the whole team gets one big point. If entering side gets three before the winning side then they wave through. Teams of three can only score big points on winning side. Play to a certain number of big points.
Variations:
Increase the number of points the team must score in order to win. Set limitations on the players. For example, no free balls, no down balls.