Yes, the brothel in "Beetlejuice" is pretty obvious if you're an adult but I'm fairly sure that when I first watched it as a kid I just thought it was a place where Beetlejuice could watch beautiful dead ladies dance. You'd see "Girls! Girls! Girls!" signs and stuff like that in Warner Bros cartoons too and it's all fairly ambiguous if you're a young child. Or at least that's how it used to be- kids nowadays probably know what a rusty trombone is at the age of 5.