Quoted from B25MITCH:Unfortunately I don't have the authority to give free play time. The place is pay by the hour, not by the game.
I set up 'Game Test days' with local leagues. Print up a form with a checklist, lamps, switches, flippers working, all shots makeable, etc.
You'll get enough feedback to make it worth your effort. Even just a couple hours with three or four people can be very helpful.