If you take a machine to a show (I’ve hit the one here in Milwaukee), you need your games to go to 3 ball, whether you like it or not. I had a game set to 5 ball there once, and people would walk up, play 3 balls, then walk away for the last 2.
However, at home, I use a 5 ball setting for Black Hole. All others set for 3.
Jeff