PS map only shows three locations last updated in 2012.

Pinballmap only shows a Sam's Place at 1375 Henderson Ave with a GB Pro in Washington.

In Pgh proper they're all over the place. I did not flip at all when I was there a few years ago. But there's a good shot I visit in the next few months, and the location lineup after a quick glance that catches my eye is Kickback Pinball Cafe at 4326 Butler Street in Lawrenceville. AFM, TZ, MB, ST:TNG, FT, AC/DC, Space Shuttle, Centaur(!) and more in a place that at least sounds like pinball matters there.

Just in time for Replay FX!

This place looks like it has a great lineup. Depending on where you are in the Washington area it might not be too far of a drive.

https://pinside.com/pinball/forum/topic/helicon-brewing-just-outside-pittsburgh-pa

This Thursday Papa is having another 3 strike fight club at 7pm and on Sunday they are having a 4 strike fight club at 5pm. You can also check out kickback Cafe in Pittsburgh nice selection of games.

you aren't going to have a lot of luck in Wash, PA... but the closer to the city you get the better chances you'll have. Plus with Pittsburgh Pinball League and PAPA, there's a tourney or league night pretty much every day of the week.