Here's a listing which has no piano in it, per se, but the ensemble in question is pretty piano-centric.

The Seniors Orchestral Society of NY (a brand-new concept)
is giving the final concert of its inaugural season.

This will be the SPRING OPERA GALA to be presented at Calvary Episcopal Church, Park Avenue South (near Grammercy Park) and East 21st Street April 20th, 2013, 8pm [FREE].

It promises to be a well-performed offering, featuring young mezzo-soprano Tynan Davis. More information at SOSNY - the Seniors Orchestral Society of New York