I didn't actually start the thread to ask advice on it (although I agree its good advice to be sure), I'm already in one and love it.
I had a lot of the same opinions that Ruutu, etc have. I thought they were all assholes and I didn't want to converse with any of them and there were only a few exceptions. With MY fraternity, it isn't pricy (right now only about $400 a semester; next to nothing compared to most fraternities on campus), they are really good guys and completely non-stereotypical in all the negative ways (for instance we don't haze, roofie women's drinks, etc) and those are the same ways that I assumed all fraternities were shit organizations that I didn't want to be a part of. Many are, but not all and I got lucky and found one that I can be proud to say I'm a member of.
As far as the fraternity being "your life" and "your only friends" I think that concept is blown way out of proportion. As with anything you can be as involved or as little involved and skim by on the minimum as you want. All that's REQUIRED for my fraternity to be "in good standing" is payment of dues and one meeting a week- thats it. The rest is how much you want to get out of the experience and how much you like the people and/or CHOOSE to hang out with them. The choice is yours. Fraternity brothers aren't your only friends and I don't know a fraternity that says you can't have friends outside the brotherhood- its just different friendship- not a replacement thereof.
I just started the thread wondering how many went greek and what fraternities they went to, that was really it