When people are looking to go the pinball show they've seen advertised and they go on their day off on Saturday only for it to be bare and people mass exiting to the door by mid afternoon, what kind of impression does that leave? Ever since the weekend was invented, Friday night and all day Saturday were the times to go out and have fun. Lots of families like to spend Sunday afternoon together doing things before it's time to wind down for work the next day. Wrapping up the show at 5 on Sunday should be acceptable for all parties involved.