cookiecutter
Proceed to Ultraslamming
Mort: Facebook was invented for this exact reason. Presumably you know her name and/or have mutual friends. I'm not saying you should ask her out via facebook, but you can at least keep some contact. Similar situation happened to me recently and she sent me a message right after I added her. It's also a good way to see if she's going to that party and if not a way to invite her.