They worked at the Shotz brewery, an obvious Schlitz standin.
Hasenpfeffer is a yiddish dish, here is a video familiar to some older generations of someone who wants to eat some Hasenpfeffer
https://youtube.com/watch?v=OdXm-cb2cjQ
Why is it Hasenpfeffer Incorporated in the jump rope rhyme they are singing as they skip down the street?
Probably because at least one of the characters is supposed to be Jewish, can't remember which one, they also sing Schlemiel, Schlamazel - unsure of spelling, which are both Yiddish words, although only Schlemiel is somewhat familiar to the public.
Hasenpfeffer is also a French and German dish - it might be considered Jewish in the US because it's especially popular in Jewish culture there? It's unlike gefilte fish which is AFAIK considered Jewish everywhere.
I’m not certain, though I have been to the Laverne and Shirley temple in Sprecher Brewery, but:
Hassenpfeffer sounds like a play on Harnischfegger, a maker of heavy construction equipment in Milwaukee.
Trivia: One of Henry Harnischfeger’s customers was Pabst Brewing Co.
Harnischfeger ran itself into the ground in the 90s. I worked in their headquarters for more than a decade. That building is prime real estate and became an FBI office.
I guess it could be if you left out the bacon… and the rabbit.
As a native Yiddish speaker (it was my first language!) I can assure you that "Hasenpfeffer" is not a Yiddish dish, it is rabbit and most definitely _treif_. Yiddish speakers would not eat it.
https://en.wikipedia.org/wiki/Hasenpfeffer
Shleimiel and Shlmazal are yiddish, via Hebrew.
https://en.wiktionary.org/wiki/%D7%A9%D7%9C%D7%99%D7%9E%D7%9...
and
https://en.wiktionary.org/wiki/%D7%A9%D7%9C%D7%99%D7%9E%D7%9...