I visited Silverball City today (108 Tipton Street Johnson City, TN 37604) and met Andreas (the owner).
Andreas on Pinside as (https://pinside.com/pinball/community/pinsiders/heryworm) has a very cool setup and is close to the downtown square. He has about 20 pinball machines and similar amount of video games.
I was pretty impressed. He keeps his machines in good repair, reasonably priced (think it was $10 for an all you can play arm band). After talking with him, he rotates his pinball machines often enough to keep it intersteing.
If you find yourself anywhere near eastern TN, be sure to stop by this great arcade in Johnson City. Oh yeah, he has canned beer at the arcade and owns a restraunt around the corner. Cool place!!