Dream Street, n. — Green’s Dictionary of Slang

Dream Street n.

[the term was coined by the short story writer and chronicler of Broadway, Damon Runyon (1880–1946); the block was the site of the stage door to B.F. Keith’s Palace Theater, 1913–2, the headquarters of American vaudeville]

47th Street, New York City, between Sixth and Seventh Avenues.

[1931		H. Reichenbach Phantom Fame 8: I changed the name of Michigan Avenue to Dream Street by popular vote].
1937		D. Runyon More Than Somewhat [story title] Dream Street Rose.
1944		C.S. Montanye ‘Death with Music’ in Thrilling Detective Feb. 🌐 Under the dimout regulations Dream Street looked like the main thoroughfare in Podunk.
1993		I.L. Allen City in Sl. (1995) 61: For young hopefuls, however, The Street was 47th Street between Sixth and Seventh Avenues — Dream Street as Damon Runyon named it.