I use okcupid, and as a guy, it is not exactly a great resource for finding people in my area. That said, I like the forums. I have also not been overly active in searching.
On the flip side, I notice women get more hits than men, my wife will be joining shortly so hopefully that will end up more prosperous.
I seem to have fine "luck" finding people interested in real life. Same way I would pick people up when I was single. It doesn't always work out (rarely does) but I don't exactly bat 100 when I am single either. Again, my wife seems to have a better run at this than I do.