Please learn the layout of your campus really well ASAP. It's just always a good idea to know your surroundings so you don't get lost, especially at night.
And I second the distinguished gentleman who said something like "a yes from a girl who's been drinking is still a NO." It just ain't worth the potential "complications" (i,e. potential charges) if she decides (when sober) that it was a mistake.
(no this is not from my own experience, thank the Almighty I'm smarter than that, but I've seen/heard it happen)