In school a few years back, when I was still a wimpy AFC afraid to talk to girls, I had a crush on this cute girl in my class. Obviously I did not act on it, but we kinda had the same social circle and she dated one of my friends for a while.

Now, I work at the public service that enforces parking laws in our town and the girl was fined. I recognized the name when her file crossed my desk, looked her up on facebook, and sent her a friend request along with something in the lines of "please don't park on the handicaped people space, because that means more work for me", just to spark her curiosity. She accepted, we chatted for a bit catching up, and that was it.

How do I pursue?

Been there mate. Here's exactly what I did and it worked perfectly.
Talk a bit on fb get her #
Txt her hey so n so you have 3 tries to guess who this is and the 1st 2 don't count :p
Light banter back and forth
You: I gotta run, but how about you and I grab a drink say this friday 8:30-9 at whatever place?
That's what I did worked like a charm if you want other options look up general text overview as well there's a thread on here with some solid openers good luck!