I've done this game before it's good for large groups and it's fun. It also is good when you have a bunch of different skill levels.
Any number can play, what you do first is this:
1) Figure out what the ante is going to be like a dollar or two dollars,what ever everyone agrees on. Every time all 15 balls are racked again, everyone still left in puts in another dollar (or whatever the ante was) .
2) Say there's 18 people playing, first draw for an order to shoot in. Order remains the same except you skip over people as they're eliminated.
3) Every player is given 3 poker chips, any three chips.
4) To start play you rack all 15 balls in any order, the first player to go will break any balls made will be spotted on the foot spot.
5) The same player will then get to shoot one shot, he can shoot any ball in any pocket. If he makes a ball any ball in any pocket (which he doesn't have to call, by the way) He gets to keep his 3 poker chips, and the next player in line goes. If he misses the next player still goes, but he (the first player has to turn in 1 of his 3 poker chips.
6) So the players just keep shooting , only one shot each at a time, lose a chip if you miss, keep the chips you still have if you make a ball.
7) When a player loses his last chip he or she is out for the rest of that game.
8) When a player shoots the last of the 15 original balls in then the 15 balls are re-racked and the next player up breaks them spots anything made as before. Then shoots his one shot and play continues.
9) The winner is the last person to have a chip left. Since there are no called shots if a lesser skilled player is left with a real hard shot, they can just blast the balls and pray, it sort of makes it fun because if they make something they don't loose a chip.
!0) The more people the more the pot builds up, because every new rack everyone still left antes up again. You can split the money any way you want, there was one winner the place where I played this. But you could make it so the last three get paid.
Everyone had fun, Good Luck !