i suspect to be in the jug -- is just an other euphemism for sex-- alot of jive songs had short lived expresssions for "scoring". As i child i knew and sang a jive song:
"Mama's little baby loves short'in, short'in,
Mama's little baby loves short'in bread"

I though the song was about shortnin bread (biscuts/scones) or better short cookies (scot's type butter cookies)
as an adult, i learned "short'in bread" was hot fast sex.

the idea of I am going to dance until i manage to convince some dance partner to have sex --makes perfect sense, and since some (most) of the slang was known only to the blacks -- it became a way to express what otherwise would have been censored lyrics.

Even some of the open lyrics where pretty far away from "main stream"-- i think of the 1930's blues song
"Coke's for horses, not for men,
they tell me it'll kill me, but don't say when
Cocaine, cocaine, run all around my brain..


my other obsession