The catcher bears more than a passing resemblance to an early incarnation of Porky Pig.
The first Merrie Melodies cartoon to use "Merrily We Roll Along" as its theme. This cartoon also debuts a blue Warner Bros. shield, which would be used until sometime in 1938.
The horn player in the Hickville band looks very much like Porky Pig.
Dizzy Dan is a play on Dizzy Dean a popular baseball player of the time.
A Boulevardier was someone who frequented stylish boulevards (originally in Paris). A sweet cocktail was also named for this term during the 30's, originating in Paris.