First of all going out for a round or two on thirsty thursdays is completly fine and normal.
Meeting chicks at the bar = not good. The last girl I met at the bar (albeit was hotter then hell), had all sorts of family problems, her unlce did things to her that we dont need to talk about, she was an ex crack head. The list went on and on. Needless to say I did not stick around for long.
Myspace... yeah, no good for dates. None of my buddies have found a level headed person on myspace. If you want to find people from highschool or whatever thats fine.