I was just in Seattle this weekend, and visited Shorty's (OF COURSE), Narwhal at the Unicorn (too loud and meatmarkety on a Saturday night for playing pinball, should have guessed...) in Capitol Hill, and the Seattle Pinball Museum. The latter was entirely as a proxy for the Amtrak waiting room, from which i was departing later on.
The Seattle Pinball Museum charges $15/adult for a single-entry and $20/adult multi-entry (the extra $5 gets you a wristband to re-enter as often as you please for the whole day). The prices for kids are lower, but i think still over $10 each. They have an ok selection of games, including a few interestingly rare/old ones. They had a Houdini included in the freeplay games available, so i spent long enough on that to get hs#1 on my last game of the day. The two games closest to the door are not included in the deal, and they were Batman66 and a color DMD Attack from Mars (presumably the remake?), but i didn't pay attention to how much they were charging for them.
They had a tech there on Memorial day, so things were getting cleaned and fixed, and he was very helpful and understanding when i twice got the ball caught on Houdini under the ouija board thingie on the right by the shooter lane (which is apparently very common).
I was pleased to see another kid-friendly place to play, even though i have no requirements for such myself, and it was clean and well-run, but not huge and so probably not worth the $$ for a well traveled player, unless you are gonna make a whole day of it and go and come back a few times. Could be fun for a family thing though. They sell some bottled drinks, including beers, but nothing i wanted - all the games have cupholders so you do at least have somewhere to put the purchased beverages. No outside drinks allowed, but i did not get scolded for my water bottle.
A quick PSA to any overseas visitors who may want to go to Shorty's or other bars with pinball in the US: Don't forget your ID! On a previous brief visit to Shorty's (during my decade of living in Japan, which is why i had no US drivers lic. in my wallet at the time) i was refused entry for lack of an ID and had to take an expensive taxi ride to fetch my passport from my luggage so i could enter to play pinball. They wouldn't even accept my offer to sharpie big Xes over my face and hands to prevent accidental alcohol being served to me! I clearly still have a chip on my shoulder about this, several years later, but it has not stopped me from visiting every time i am in Seattle. :p