I went to Pitt, and I pledged for for the Pikes at Pitt. I know there is a long running joke about the Pikes on the benchwarmers, but it wasn't an over the top bro-ish group. My dad was in the frat back in the 70s so that was enough motivation to at least give it a shot. I quit about halfway through the process. I didn't quit because of hazing or mistreatment or excess drinking or anything like that; I just didn't think the hassle of pledging (i.e. raising money for some charity that no one in the frat actually cared about, going around to meet all 120 kids in the frat, etc.) was worth any rewards. It was definitely a fantastic way to network and meet girls though. But I knew it wasn't for me, so I hung it up halfway through. I really don't have anything bad to say about frats, though.
College would have ended up different for me if I stuck with it, though. But one valuable lesson I learned is that college is what you make of it. It is easy to meet people who share interests with you. You control how hard you work, who you associate with, if you party, etc.