For those stuck in New York the best bouldering is in central park. There are only perhaps three boulders worth climbing on. On is on 110th street overlooking Harlem. It is called the worthless boulder and has problems from V2 - V5.

Furthur down in the park on 66th street by the softball fields is Rat Rock. This is the best place to boulder in the park in terms of range of routes and chance of bumping into other climbers. (It's still shit compared to god's own rock (grit) or to font).

If you have transport you can go up north to the Gunks where there is world class bouldering, so I am told, I don't have transport so I don't really know.