Live public sex shows are protected expression
The case came after two officers paid to see a "one-girl" show, then returned for a "two-girl" show. (Case does not spell out all of the possible shows, but you cannot help but wonder.) The officers then arrested various folks involved with the establishment for: (1) having a live public sex show, (2) promoting prostitution, (3) compelling prostitution, and (4) using a child in a display of sexual conduct (because one of the girls was under 18).
The proprietors' defense to all was (to paraphrase): "Well, yeah, we did it, but it's free speech, man." (No word on whether the proprietors had access to a medical marijuana card, but feel free to imagine it to be so.)
The court held that in Oregon, live public sex shows are constitutionally protected, so you cannot outlaw them. On the other hand, making that other stuff illegal is just fine, so the proprietors' convictions for the other charges stand. Sentencing awaits.