Green’s Dictionary of Slang

(US Und.) an illicit drinking den; also attrib.

1931		Hammett Glass Key 462: ‘They went to a lot of places, mostly speakies’.
1933		C. Himes ‘Prison Mass’ in Coll. Stories (1990) 165: Gorgeous, too, as a big-shot gangster’s funeral; wanton as a Harlem speaky.
1952		(con. 1920s) ‘Harry Grey’ Hoods (1953) 52: Bootleggers and ‘speakie’ operators came to us for protection.