I'm actually going myself this Friday, for a concert. Going to finally see Mogwai with a couple of my friends, after the concert was delayed a year or so xD
They're playing on the 14th and 15th, tickets at the door are only $33, so if you have time and would like to see an awesome concert... I'd recommend it. Awesome post-post-rock music, lol.
Other things to do? Ummm... I only go to NYC for sporting games, cons, concerts or the like, so idunno much else to do.
Yes, I realize this isn't quite on par with the things you have listed so far (those are all so awesome
), but it's all I can think of atm hehe.