Any in the Seattle area???

That depends on the adult cinema. Obviously the motion pictures shown in these theaters feature explicit sex.

But does sex occur among the audience members? Sometimes yes and sometimes no. I've been told very explicitly when purchasing my ticket "There's no smoking and no jacking off inside." I would presume that also means no fucking and no sucking. In others, sex in the seating area between patrons is de rigueur.

Go and find out.

I always sit bottoms naked in porn theatre.the guys see u wankn they join u

Maybe if you are lucky you will encounter a couple in the theater, who are looking for some fun.....a very common ocurrence in many adult cinemas.