North East Tolkien Society
This society has been semi-dormant since 2009. It is located on Staten Island, NY, a borough of New York City. Heren Istarion published its own calendars in 2008, 2009 and 2010. The 2011 Heren Istarion calendar was available for pre-order but is unclear whether it was eventually released.
The main force behind Heren Istarion are Anthony Burdge and his wife Jessica Burke.
Aside from Heren Istarion New York City has a Meetup.com group: NYC Area Friends of JRR Tolkien & Fantasy, that appears to be active as it meets monthly.