Green’s Dictionary of Slang

1. the South Side of Chicago [ironic use of sense 2].

1957

Hearings Before the Subcommittee on Cotton on H.R. 954 310: The scores of hillbilly hangouts scattered from West Madison Street, Chicago’s Skid Row, to ‘Glitter Gulch’ on the squalid South Side.

2. (US) the Las Vegas downtown casino area.

[1920		O.O. McIntyre Bits of New York Life 26 Dec. [synd. col.] Looking north into the dazzling gulch of roaring Broadway at midnight].
1953		O. Lewis Sagebrush Casinos 188: The eight-mile long Las Vegas Strip was living up to its nickname of ‘Glitter Gulch’. [Ibid.] 203: Glitter Gulch, or, as the Strip was coming to be termed in some quarters, the Las Vegas ‘Rue de la Pay’.
1968		T. Thackrey Gambling Secrets of Nick The Greek 77: The big action in Vegas was downtown, in ‘glitter gulch’.
1972		D. Pendleton Vegas Vendetta 128: Just the same, there was a noticeable apprehension all along the Strip and in the city’s Glitter Gulch — wherever games were played in that valley [HDAS].
1989		R. Ebert Movie Home Companion 37: He uses Bridget Fonda and James Mathers as young lovers who arrive in Las Vegas, drive slowly and (given the music) sadly down Glitter Gulch.
1999		L. Klein It’s in the Cards 63: ‘Glitter Gulch’ — a euphemism for downtown Vegas.
2003		S. Doggett Lonely Planet Las Vegas 21: The blocks around the intersection of Main and Fremont Sts are known as Glitter Gulch, and feature those long-time grinning neon icons, Vegas Vic and Sassy Sally.