First of all, go see Grey Gardens. It is amazing, if for no other reason than Christine Ebersole's astonishing performance, as well as Mary Louise Wilson's. (The score and book are incredible, in my opinion.)
THings to do-If the weather is nice, you could go uptown to the Cloisters and look around (good walking spot.). You could try picking up a walking tour of Harlem (I did that when I was a resident of NYC.). Indoor stuff in case the weather isn't so nice: Go to the Museum of the City of New York, the Frick, and the Whitney. Those are very nice and tend to be less crowded than the Met.
Have fun!
"A birdcage I plan to hang. I'll get to that someday. A birdcage for a bird who flew away...Around the world."
"Life is a cabaret old chum, only a cabaret old chum, and I love a cabaret!"-RIP Natasha Richardson-I was honored to have witnessed her performance as Sally Bowles.