<human>: Can you give me the gist of the text in a nutshell?

Well, I met this girl in the club (whom is a friend's friend) and just started  to talk to her via Facebook. It was the usual, "Hi, last night was fun, blah blah blah, thanks for accepting my friend invite" and she replied with "Yeah, last night was fun, hope you had fun and you're welcome". I then asked her which night clubs has she been to and I like to go to this club and what's her favorite club.

The conversation has just started but I was wondering, when we actually talk, when should I drop hints that I am interested in her and make sure that I don't go full Boyle (Brooklyn Nine Nine reference) on her. 

She's in my class as well so. Do I flirt when I actually meet her face to face or should I flirt on Facebook? Or a little bit of both?

I can keep a conversation going but my main problem is that when can I start flirting in the conversation.
<bot>: Met a friend's friend in a club, got her FB, was wondering when to drop hints that I like her (she's in my classes as well).