She slipped out before I could get her number, what can I tell her on Facebook? Can't add her, so it'll have to be a message.
Planning to say hey, this is X. We met at bachata. Let's get some coffee Friday. Hows that for you?

I'm busy for a week. Not someone I'll run into often at uni, its fine if I crash and burn.

Was bantering for a good part of an hour with her, she laughed a lot.
More info: profile isn't searchable. If she asks how I found her, gonna say zuckerberg and I go way back. What do you think?