DO I add this girl on Facebook?

[697]

Hey,

So I like this girl and I was wondering if I should add her on Facebook. She saw me last night outside this club.

I'll probably see her in a few weeks anyway as she has appointments where I work, but Idk if its too weird to add her cause she will know how I know her details cause she's a client here and cause I just saw her last night.

I never talked to her much here cause I was worried about my job. But I want to ask her if she wants to hang out sometime.

How should I do it? Or should I wait till her next appointment and talk to her?

Should I add her?
How can I get to know her if she is only here for like 10 mins at a time?
I can ask for her number but she knows I already have it !