Okay, we need the collective power of the GoDC community. The best clue in the photo is the “1743” … where is this, and does the building still exist? Post your thoughts in the comments below. The photo below is from the 1930s.

Source: Library of Congress
Any idea where this is? Maybe downtown?
WPost classifieds 3/27/1935, under Cleaners and Dyers, lists a Samuel Walker at 1741 L St. NW.
I had WAY too much fun with this. You can see a big street full of cars reflected in the door and the backs of cars in the window to the right.(like it's near an intersection of two big roads) I was guessing 1734 K Street NW (with Connecticut to the right) Sounds like Stephanie is totally right.
That's good research!
Census Records and City Directory from District of Columbia 1930 appears it could be L Street NW? 1743 L Street resides Victor Leyking, age 52, born Germany, proprietor of Dry Goods Store, wife Elizabeth age 46 born Germany. 1741 L Street NW resides Samuel Walker age 47 born Russia, occupation: Tailor, owns his own shop, wife Ida age 40 born Maryland.
Samuel Walker was a tailor at 1741 L ST NW. The number 1743 is next door to Samuel's shop.
1909 Boyds says Saml Walker 1743 L St NW
1932 Washington City Directory lists a Samuel Walker, Tailor, at 1741 L St NW – could store be next door to doorway w/2 ladies
“Boyd’s Directory of the District of Columbia” from 1909 lists the same Samuel Walker at 1743 L Street NW.
Update: Walker is featured in a Washington Post classified from March 24, 1935.
Chocolate Moose!
Cool!