Green’s Dictionary of Slang

(US black) a bar.

1926		Blind Lemon Jefferson [song title] Chock House Blues.
1998		(con. 1920s-30s) Govenar & Brakefield Deep Ellum x: The night-life entertainment on Elm Street and nearby portions of Central Track was presented in dance halls, theaters, cafes, ‘chock houses’ and ‘soft-drink stands’ where bootleg alcohol was served.