Great idea! Small feedback: one of the pianos listed for Minneapolis is in Concourse C at the airport. While this is, in fact, an actual piano, you have to go through security to play on it. So I'm not sure if this counts as a public piano?
Actually these are the best public pianos in my opinion - people often search for public pianos when they are traveling and travelers often enter/exit airports. Also the airport pianos are usually the best maintained.
Along those lines: this has happened exactly once in my life but man was it something, getting off a red eye at 6am and noticing a piano in the middle of the food court. Place was a ghost town except for the morning shift relieving the evening shift, a few food vendors setting up and us, the first arrival of the morning.
Guy a few feet ahead of me pauses, sits down, and unleashes a beautiful melody that stops everyone in their tracks.
There's an applause, he calmly gets up, and we all continue on our way.
That particular pianist, Paul Barton has a whole bunch of very nice renditions of various pieces, he lives in Thailand and seems to be a genuinely nice person as well based on the videos of him that I've watched. Two recommendations, the one is Bach's version of the adagio, the other the fugue part of 'Toccata and Fugue'.
And he is also a great painter and there is an awesome video of him painting a portrait of Josh Wright, who is a concert pianist that has lots of educational videos online.
One thing I love about watching Barton is that he has the hands of a mere mortal. So you can see how he accomplishes various reaches and fingerings if you don't have gargantuan piano hands.
