Tickling the ivories in this tough town...

Does anyone know what author reintroduced this comical public notice and what town this notice refers to?:

"Tickling the ivories in this tough town is rumored to be a dangerous endeavor."

I need to know what town this was and what author reintroduced this notice.

How about: don't shoot the piano player. www.phrases.org.uk bulletin_board 3 messages 520.html