Green’s Dictionary of Slang

(US) a restaurant.

1922		Davenport Democrat and Leader (IA) 28 May 32/2–3: We bloused into a nosebaggery with a flat-wheeler and boiler-factory.
1922		Edwardsville Intelligencer (IL) 14 Sept. 4/4: The Flappers’ Dictionary [...] Nosebaggery: A restaurant.