a good story i have here shows the power of facebook 
there was a music festival at my university, and the pre party for it was at this guys house. there was about 14 girls and 3 guys, me being one of them.
a few days after the festival, everyone had added me from the pre party, as i only knew one of the guys there and hadnt met any of the girls until that day.
anyway, 3 weeks later and one of the girls who didnt add me soon after the festival added me, because she had seen me talking to her friend at university and so just added me. i didnt talk to her at all on facebook chat - the occasional wall post but thats it - and managed to fark her at another party.a few weeks later.
another story. at the same party that i farked the girl above, i was talking to another girl who i had met before but didnt add on facebook. the day after the party she added me on facebook and we were talking and stuff and she gave me her number.
dont underestimate the power of facebook. everyone knows that people are more relaxed/in their Comfort zone in their bedroom on their computer instead of being at a party where drunk guys are going to try hit on them all night. they wont have their guard up and are generally in a relaxed state. also it can be a quick, easy way to get to know someone, and build rapport if your confidence isnt the greatest
-hff