I am not a pinball expert or player, but the Pinball Hall of Fame is a treasure. First of all, there is no entry fee. I thought it would be something of a museum, but it is really a huge arcade with machines from the 40's 'til today. The only money you pay is the coinage you use to play the games. By the way, they can change singles, but not large bills, so bring coins or one's. You can play any of the old games that are turned on.
If you have any interest in pop culture or art or Americana, you will be fascinated by the machines from the various eras. The art on the playing deck as well as on the back glass is worth studying. The progression of the games from no flippers, to flippers, to all sorts of craziness is interesting to track. There are other games such as steam shovels filled with lentils and spinning helicopters. Expect so spend at least an hour to an hour and a half.
Should you be a pinball person, this has to be heaven.