Tag team speed pool eight ball.
I've done this at parties and it's a blast.
I used a measles cue ball and a red circle cue ball.
It's determined before the break which team is solids and which is stripes. A player from each team breaks at the count of three, You can't shoot until the cue ball moves and if someone is down on a shot you can't impede their shot. After you shoot, you run over and tag your partner. Mayhem and hilarity ensues. Slop counts on every shot.
The game is over quick and the next team is up and everybody gets to play and even the bad players have fun because slop counts and no one can really see who is good or who is bad.
If you have a couple of different looking eight balls this can speed up the game. I had a gold one so before the game you would say okay we are the "gold-stripes" and you are the "black-solids"
Good exercise too.