The Guild's page has a little info on the club:
Local game groups open to the public
* Columbia Strategic Simulation Society: Meets on alternating Fridays from 7:00pm to 1:00am (during the Fall, Winter and Spring). CSSS is held at Columbia University (Jerome Greene Hall, 435 West 116th Street, Room 304).
* New York City Boardgames & Cardgames Meetup: Meets on 1st and 3rd Thursdays of each month from 6:00pm to Midnight. This club is held at the Neutral Ground Gaming Room.
Local game stores
* Neutral Ground: 122 West 26th Street, 4th Floor (between 6th and 7th Avenue), 212-633-1288
* The Compleat Strategist: 11 East 33rd Street (between Madison and Fifth Avenue), 212-685-3880
There's also a link to the Columbia club's webpage: http://www.columbia.edu/cu/csss/ which is a bit out-of-date now since it hasn't been updated in 6 months, but still has some useful info on there, like a map to the building and lists of past games played, plus the club's e-mail address. Anyway, there's actually a meeting tonight (and then probably another on Friday, October 26) which I hope to make it to, with Imperial and San Marco in tow, but there'll be tons of other club games there.