Street Jazz On January 17, 2015 By Fred KingIn Brooklyn, musicians, Nikon D7000, Park Slope Jazz on 5th Ave., Park Slope, Brooklyn. William Alexander Middle School #51 in the background. 40.672111 -73.983882 Rate this:William Alexander Middle School 51, 350 5th Avenue, Brooklyn, NY 11215, USA Share this:Share Print (Opens in new window) Print Share on Reddit (Opens in new window) Reddit Share on LinkedIn (Opens in new window) LinkedIn Like Loading...