Is there any to make them up without being being creepy?

I was chatting up a waitress at a local restaurant, but her shift ended midway through my meal, so I never got a chance to give her my number or get hers before she left. My curiosity kind of got the best of me later on though, and armed with first name and where she was from, I found her on Facebook. I don't know if it would be too creepy messaging her, or dropping by/calling the restaurant would be better.