Ah, the land of Service Entrances. On a block littered with townhouses and apartments (and one hot dog vendor), it's hard to imagine that any one would stand out. However, about halfway down the street sitting quietly at #8 a swooping stoop curls up toward the current home of the Columbus Citizens Foundation. After buying the building from Sweden (yes, the entire country...they were using it was their NY Consulate) in the late 1960's the CCF began using it as their main headquarters and will often open it up for "cultural and social events". Ambiguous as those events may be, the few pictures I could find show that this building is no joke – especially its lavishly-decorated Oak Room.
Unfortunately, the inevitable result of this street is that you'll eventually end up on the criminally-boring and crowded Madison Avenue. I've gone on the record several times before that Madison Avenue is my least favorite street in Manhattan. I continue to stand by this.