Abhishek Joshi of the Columbia Population Research Center (CPRC) writes:

CPRC is pleased to offer an easy way to locate New York City related databases. The New York City Dataset link includes data such as; NYC Community Health Survey, NYC Youth Risk Behavior Survey, NYC HANES, MapPLUTO and much much more. The website provides easy access for downloading data sets, code books, data dictionaries, online data extraction tools and other relevant documentation.

I did a quick check and it seems that you can access a lot of information here without needing a Columbia University password.