People bash dating sites but I've had success in the day and it really is a great resource for quick and promiscuous sex.
I met a few girls (and had easy intercourse) on okcupid and match.com when I was living in a new area and single. Have quite a few crazy stories. I didn't, however, meet my current lady friend online.
It's funny, me and my buddies were laughing the other day how we would pickup random girls from the AOL days -- member profile search was the shit.
I've been hearing about Ashleymadison.com (not free) lately -- strictly a hookup site.