yeah, this is a girl you have been dating. Not some bar skank so I guess you gotta do it.
Bar skank equals come up with some reason to leave room for a second and then go out the door/window or whatever to leave. Preferrably make sure you have your pants, wallet and phone. Going back could be kinda awkward.
no chance you tell the bitch to shave that mofo first, thats just plain nasty. besides you got your joint copped first so who cares if she gets any lol