NEW YORK (AP).- Consider them keys to the city: Anyone who gets a sudden itch to tickle the ivories will be able to play free public pianos in 50 places throughout New York City, from the Coney Island boardwalk to the Metropolitan Museum. An art installation touring the world is making its first U.S. stop beginning Monday. For two weeks, players can play tunes on pianos all over New York City, at famous landmarks like the Lincoln Center, the foot of the Brooklyn Bridge, the Staten Island ferry terminal and Central Park’s bandshell. The concept, devised by British artist Luke Jerram, has put more than 130 pianos in parks, squares and bus stations since 2008 in cities including London, Sydney and Sao Paulo. And now it’s New York City’s turn to play, Mayor Michael Bloomberg announced Thursday. “There’s going to be a huge amount of talent here,” Jerram said in an interview. “The piano’s actually a blank canvas for everyone’s creativity, really, so I just hope that the city enjoys it