To latch onto the idea that sth is going to happen.   to begin to understand something. 
IT´ll be a laugh!
You turn up looking sexy. He´ll buy you all the drinks you want and if you don´t like him you can leave.
We always had a good laugh.
Girl´s night out.
Go on the pull.

picky= fastidious,  excessively sounpicky= no excesivo.unfussy = no-exigente.