I wish I'd known about this a long time ago. Every second Sunday of the month St. Jacobi hosts free concerts for the community. The concerts are with professional musicians from around New York City. The September 14th concert is with The Sepia Ensemble. I haven't been able to find much information about The Sepia Ensemble, so if anyone knows what type(s) of music they perform or some background, please let me know! Concerts are at 4 PM, and they are free and open to the public.
St. Jacobi is on 4th Avenue at 54th Street. It was the first "Then and Now" that I featured here.