If you're in New York and you have an affinity for pianos (either playing them or loving them), then you need to go visit the Steinway & Sons location on 57th Street (between Sixth and Seventh Avenues). You can obviously go there to buy pianos, but what's better (and somewhat of a secret) is the fact that you can go in and play almost every, ridiculously expensive piano in there. And no one minds. All the pianos are separated into different rooms, so it's not like you're disturbing anyone either. Both the times I've visited, I've been the only person in the whole place.
The John Lennon designed piano
It's really a crazy thing that they'll let anyone just come in and play, so if you do possess that talent? Get on over here. (Apparently there's also a factory tour that you can take in Astoria that's free, but not available year round. So once I take that, you'll hear about it.)