The definition of NoSQL varies greatly, but the NoSQL NYC Meetup will be a place to discuss any alternative databases: from large distributed key-values hashtables to document-stores. Newbies welcome!
You can also keep track of various NoSQL events in the city by following the group on Twitter: http://twitter.com/nosqlnyc Please let me know if I missed something.
The goal of the meetup is to build a local community, so please do not join the meetup for the sole intention of promoting non-related/distant conferences, products, webinars and services. Job postings from companies are very welcome, recruiters are not.