Here are some astronomy clubs in the NYC area.
Dave Mitsky
Amateur Astronomers Association
Gracie Station
P.O. Box 383
New York
New York USA
10028
Michael O'Gara
president@aaa.org
212-535-2922
http://www.aaa.org/
400 members
Amateur Observers Society of N.Y.
Robert Wolyniec
meademan@earthlink.net
718-347-4163
http://www.aosny.org
Astronomical Society of New York City
153 Arlo Rd.
Staten Island
New York USA
10301
Thomas Hamilton
718-727-1967 (phone & fax)
20 members
Astronomical Society of Long Island
Huntington Station
New York USA
11746
Bob Benward
info@asliclub.org
http://www.asliclub.org
over 100 members; meets every Wednesday except for holidays..