It's far too hot for this in San Antonio in the summer, but what a great idea this winter or spring!
The piano was standing innocently near the Millennium Bridge, minding its own business except for a cheeky come-on — “Play Me, I’m Yours” — printed on its side. For a 24-year-old Australian tourist named Lauren Bradley, it was as alluring as a sign saying “Free Chocolate.”
“I live away from home and don’t have my own piano, so any chance I get to tinker, I take it,” Ms. Bradley said, spotting the piano after crossing the bridge. Without even sitting down, she pounded out the beginning of “Ain’t Misbehavin’ ” as passers-by recorded her brief performance on their cellphones.
There's more of the story here at the NY Times...