Just remember if she asks you a question when the lights go out, to not shout "NO!"
Hehe, j/k, I remembered that from another thread of yours.
Anyway, just think of her as another of your 'guy' friends and keep it cool. Don't treat her any differently, except in bed.
Seriously, yeah, don't think of her as a "female" but just as a friend. And when she talks, give the same answer you would to the male friend you are taking along.
Oh yeah, since its the ritual here at ATOT, :camera:? Specifically of this girl and maybe your GF, hehe