Quoted from nwpinball:I've never left games on overnight. Probably the longest is 16 hours when they've been at the NW Pinball & Arcade Show. Bringing your games to a show and leaving them on that long with hundreds of people playing them seems to be a pretty good test of how they can hold up.
at MAGfest, my STTNG and WOZ were played for like 70 hours straight. both got about 900 plays. there were a couple mechanical issues that had to be dealt with due to the sheer number of plays, and they came back quite a bit dirtier than they left, but neither showed any sign of having problems due to being left on Thursday through Sunday.