Works for 4-6 people. Split the players up into two teams. Teams make a line at the baseline (or behind it.) First player for each team steps up to the baseline and plays a singles point (with or without serving either works great.) Keep track of the score with each point. Each player stays "in" (ie keeps playing out points) until they LOSE 2 POINTS. then the next player on their team steps up and plays out points until THEY MISS TWICE. PLay to 11 or 21.