Maybe there's a big scene I'm not aware of, but there doesn't seem to be a huge pinball presence in the area. I'm not aware of any leagues. There are scattered locations that may have a pin or 2 in various states of disrepair.
The main permanent attraction is Zanzabar that always has several pins, but don't plan to go on an evening. They'll likely have a band playing and you'll have to pay a cover charge for the pleasure of entering so you can pay to play the games...
Then there's the annual Louisville Arcade Expo that usually has a lot of pins and hosts tournaments.
Other than that there are some local collectors that you'll run into if you do any buying, selling, or trading. Pinsider Madpole has hosted a couple parties.