Green’s Dictionary of Slang

1. the main street of downtown (less fashionable) Las Vegas.

2001

(con. 1964–8) J. Ellroy Cold Six Thousand 203: The Deuce rolled low — nickel slots/bingo/shots-and-beer.

2. New York’s 42nd Street, between Seventh and Eighth Avenues [until the shutting down of many cinemas and bookstores specializing in pornography in the early 1990s, this was the centre of mid-town vice].

1985		Duke Bootee ‘Broadway’ 🎵 Hot town, sweatin’ the Deuce / All the thugs, pimps and prostitutes callin’ a truce.
1987		Ice-T ‘Six in the Morning’ 🎵 About 4 am we crashed the Deuce / We never catch static ’cause my boys got juice.
1992		N. George ‘Cool vs. Chilly’ in Buppies, B-Boys, Baps and Bohos (1994) 69: The selection [of movies] on the Deuce spanned the gamut of male adolescent interest.
1995		(con. 1985–90) P. Bourjois In Search of Respect 194: We be smoking cheeba; drinking brew; hanging out on the Deuce.
1998		L. Stringer Grand Central Winter (1999) 239: Years later [...] I returned to the Deuce to find that its attractions had been reduced by one dimension.
2010		Codella and Bennett Alphaville (2011) 39: The campy grindhouse gore and crime onscreen paled in comparison with the action [...] on ‘the deuce’.