I just found a couple of HBs on the facebook page of the University I'm going to. I decided to open with an odd message:
"There are two charity collectors on the street, and I only have a £2 coin in change. Do I save the tigers or the donkeys?"
I thought this makes me seem like I care enough to give to charity; also, implies that i'm financially sound that a) I have money to donate and b) I have more than the change I have in my pocket. Furthermore, it's quirky, mentions animals and also maybe a subtle way of asking what sort of guy she likes.
Tiger: Dominant male.
Plus it can be followed up by something like:
"Wow that's harsh!, what have the donkeys/tigers ever done to you? I never pegged you as a donkey/tiger hater."
My first go at an online opener, what do you think?