Green’s Dictionary of Slang

creep joint n.

[creep v. + joint n. (3b)]

1. [1920s–40s] (US, also creep) a lowdown dancing club.

2. [1920s+] a brothel or unwholesome apartment house, esp. one where patrons are robbed.

3. [1930s] (also creeper) a ‘floating’ gambling game, operating in a different location each night.

4. [1950s] anywhere run by unpleasant or unpopular people [creep n. (3)].