She talked to me and was interested in my pet pictures and stuff. I didn't leave my name or contact details, but she did write down the book I was reading, which was Graebers debt book. What now?
EDIT: I didn't actually want advice, I'm just not sure where to put mildly amusing anecdotes, so I put it here framed as a question. I'm not going to stalk at the bar
Your only recourse is to become a nightly regular at that bar, stalking the place where you met until she shows up again.