My roommate is just used to me and my amiga A (of the giant bug sobbing breakdown fame) watching the show in the room (she's been working her way through the seasons and I've been along for the ride/emotional torture that is rewatching the early seasons with a knowledge of what will happen later). We've occasionally been, shall we say, none too sober, and we're sort of vocal. Generally it's A going "Look how cute Sam is!" and me going "Look how sad Dean is!" :P