In today's world of ubiquitous sneaky little cameras, it is interesting that pretty near everyone on the street knew their pic was about to be snapped.
The awning on the right has "84," which should help pin down the location.
Emporis (whatever that is) has the structure as three stories, 33 feet tall and built in 1910:
http://www.emporis.com/building/84-m...rk-city-ny-usa
I love old postcards!