In NYC on vacation (New York)

Hi Everyone,
I am on vacation in NYC till the 18th of May. I am staying in the Upper West side of Manhattan with my sister who lives here. She is away at work most of the day and I've been exploring the city on my own which has been fun.
However, I could use a companion. I am going to the MET opera tonight for Die Walkurie and will probably be getting a bunch of concerts in the coming weeks as I am a music fan and New York seems to be just the place. Anyone wants to join me? I am also going to be exploring other sightseeing aspects of the city as well as restaurants, bars etc..
Look forward to hearing from someone.