For further information about tonight's (Saturday, January 26th 6:00pm) free star gazing event, please go to: http://www.nycgovparks.org/events/2013/01/26/astronomy.
The Marine Park Salt Marsh Nature Center is a gorgeous destination. See: http://www.yelp.com/biz_photos/salt-marsh-nature-center-brooklyn?userid=r5flSccwJ-YVnT8ASZs7tA#Ry6EOmTqX60XX7elgf56qg
I imagine that by tri-state metro area standards, the light pollution is low and the observing is quite good, but bundle up with layers so you will be warm enough to have fun.
This event is hosted the Urban Park Rangers. The Urban Park Rangers telephone number is[masked]-2021. Their webpage for tonight's event says:
"Astronomy programs feature the use of telescopes and binoculars to observe specific astronomical events. Many programs feature astronomy experts and all equipments is provided. Night Sky programs highlight the history and folklore of the solar system, using the naked eye to locate stars and planets. Programs are best enjoyed on clear nights, so please call ahead if weather conditions are not clear."
For various public transportation options to get to Brooklyn's Marine Park Salt Marsh Nature Center at Avenue U and East 33rd Street please go to: http://www.hopstop.com/search and type in your starting point and your destination: Avenue U and East 33rd Street in Brooklyn.
I note that the Urban Park Rangers do a tremendous job co-hosting and co-organizing Urban Starfests with the Amateur Astronomy Association of New York. The Urban Park Rangers are a terrifically well run organization with great people.