It is located off the Astoria Blvd Stop on the N/W line. Exit the station on the side of 31st street that is opposite the Neptune Diner (there is a small park on that side of the street with a playground and tennis courts that you should be able to see from the train platform). Walk a block or so down 31st street (not in the direction of the burger King or gas station, the other way) to the intersection of 24th Avenue and 31st Street. Cross 24th avenue, and take a left down it, it will be the 2nd or 3rd building from the corner.