Besides the mannequin imitating Maurice Chevalier and Ted Lewis, the dancing coat racks are meant to evoke Joe Frisco, who did a similar high-step strut with a tilted derby, cane, and a cigar in his mouth.
Ted Lewis is caricatured here and in the slightly later Looney Tune, Bosko in Person (1933); in each of these shorts, the main character imitates Lewis's signature phrase, "Is everybody happy?"
The barking dog in the applauding junkyard audience is a depiction of Nipper, the famous trademark of RCA (USA) and HMV (UK) records.
The 45th Looney Tunes cartoon to be released.
Vitaphone production reel #5492.