I don't think it is a very serious piece of lyrics, but to me it is about being on the road with a troubled (or even ex-) love relationship back home. "I just can't seem to drink YOU off my mind." (referring to his (ex-)woman back home.

So the protagonist hits a drunken stupor, going for casual sexual acquaintances along the road.

I particularly think the first verse is funny and I don't think Jagger(/Richards) is referencing a hooker. The gin-soaked bar-room QUEEN could just as well be some guy in drag, strong enough to throw the alcohol marinated protagonist across the shoulder, trying to carry him upstairs. Not sure if it ended in sex though.