I have a mate who will set his facebook status to something like
“……..wants sex, any takers?”
“want a girlfriend, whose up for it?”
“just going to make love to myself, anyone wana join in?”

Always gets good response people find it funny, it will grab girls attention, not saying it will definitely get you laid but it lays the foundations and there is always a chance.

And a few hours later change your status to:

“sorry, my dick head mate posted my last status” or some shit like that.