An elderly Russian chess player who charges two dollars per game often sets up shop on the patio outside the Au Bon Pain in Harvard Square. A consistent crowd of tourists wanders in and out of the adjacent Holyoke Center, but this Mass. Ave. hotspot has recently developed a musical dimension: a public piano now graces the street corner, one of many pianos installed by Luke Jerram’s international “Play Me, I’m Yours” project. In celebration of the 75th anniversary of the Celebrity Series of Boston which features local performances by internationally recognized musicians, the project has installed 75 pianos on the streets of Boston from September 27 to October 14.
