What's worked for me (yeah, I've done this too) is to run the interview process yourself. Understand what the event is about, conversation. The bad thing is that more times than not the majority of the people there aren't good conversationalist so unless you drive the interaction yourself it's like pushing a boulder uphill.
I say come in with some good questions. Not any of the "What do you do," "where did you grow up" boring BS either. Have at least five creative questions, nothing too intellectual but ones that don't typically come up in conversation, basically qualify her right then and there (be confident, not ****y; it'll scare them away). Here's another reason why it will work, if you drive the interview you can answer your own questions too in order for her to get to know you. This way you won't go in worrying about her asking you something off the wall that you weren't prepared to answer.
Be a man and take control. It'll make you stand out from the the AFC and make you memorable. You'll be surprised how many women say that they're interested in you, even the ones you weren't interested in yourself.