Oh God, I rushed my freshman year at TAMU with my mother pointing a gun to my head. I wish I'd been diagnosed sooner in life, then maybe she would have understood how horrifying it was. Then my sophomore year, my parents held the proverbial gun to my head again and made me move INTO THE HOUSE. With fifty shrieking girls. My second night there I packed up all my things and moved in with my friend. It didn't help my roommate was the weirdest girl in the weird sorority and kept her dead pet fish in a glass case. Also keep in mind I'm queer as all get out, haven't worn a dress willingly in ever, and the only sorority that accepted me on bid day was known as "Dog House." I was cut from 10 out of 12 on the first day. There were a few girls in ADPi that were actually pretty damn awesome so I stuck it out for my freshman year; the house was just way too much going on. I believe RUSH is now referred to as Recruitment nowadays, at most schools. Just FYI...
All that said, I did learn a LOT about socializing. I was pretty involved my freshman year in college, didn't do too well in school b because of it, but I was a student representative for the GLBT group, started the local roller derby team, a Fish Camp counselor (A&M thing, basically an extended orientation/summer camp for incoming freshmen), and was chosen as a Gold Star (hah) recruiter. How? I am damn awkward and bad at socializing, but after going through student rep, derby (which was a full time job on it's own), and FC counselor, I'd gotten really REALLY good at faking conversations and getting people to talk about themselves, and at the sorority's practice runs I was actually called out as one of the best interviewers. After five days of rushing practice, I was even better at it and got put in charge of a rotation squad (12 other sorority members) and had to coach them.
Well, I've been through Recruitment both as a Potential Member and a recruiter, so I feel like I'm pretty qualified to answer your questions. Feel free to PM me. Every sorority is different at every university, and there are genuine people in all of them, as well as nasty b*****s. My Big sister (basically my mentor) was awesome, a little Aspie herself I'm sure and also super gay. My next-door neighbor in the house was huge into anime, comic books, and video games so I came to her room a lot on the weekends to "nerd party." Rush/Recruitment is the HARDEST part of the entire process, once you're in, there's a lot less obligations to fulfill. They all require you to do volunteer work, anything of your choice, and those can open up some really awesome opportunities to meet people (it's how I got into Fish Camp which was the highlight of my entire college career).
Also I'm now an "alumni member," but I dropped out of college and the sorority and have lots of tasty inside info that I'm not sure I am allowed to divulge but want to so bad and will if asked...