I'm in college, and am in a Greek Organization, and honestly, and pledging (process of joining), and spending time as a brother of this organization, are absolutely two of the best things I have ever done.
Granted, I'm in a co-ed service fraternity and not the traditional social fraternity, we don't have a house, and are REALLY strict against hazing (no drinking 5 gallons of water while pledging us!), and the like, so we're about as different as you can get from Animal House.
While I have never been diagnosed AS, I have historically been clueless when it comes to socializing (this, combined with friends I have who are on the spectrum, are 2 of the main reasons I became a member of WP). Never quite got it. Never really knew how to take the initiative. And while there's still a lot I don't get, the structured social life of the Fraternity I'm in has allowed me to take my good intentions, and play them up, and in the process make more friends than I have ever had in my life.
I'm sorry if this sounds like ranting, bragging or gloating, but this has kinda hit home. I look at my (very AS-like) social awkwardness before I pledged, and look at what my social life has become, and like I said, while there's still a lot about social skills I don't get, I have, without a doubt, learned more in the past 20 months than I have in the 20 years before it. If the right frat's at your school, it could be a great opportunity.
That said, there are fraternities and there are fraternities. I personally really do not think someone with AS characteristics would do so well in a traditional social fraternity or sorority...especially one with a house. A Frat/Sorority without a house (or where you don't need to live in a house, if they have one), will give someone who is AS a valuable seperation of social and personal lives, so you won't have to worry about your fraternity/sorority brother/sister worrying about if you brush your teeth differently, or can't stand if the hall light is left on at night, etc.
While my experience in Greek Life (as different as it has been from a traditional social fraternity) has been positive, I will advise against running up and trying to pledge the first greek organization you see. SPECIFICALLY, if someone IS interested in possibly joining a Greek Organization (AS or not), I'd advise the following:
-Ask what the pledge requirements are...if they can't say, or refuse to tell you, you probably won't want to join them anyway.
-Ask if they have a house, how often they meet, and what they do when they meet.
-Ask specifically what they do to ensure there is NO HAZING.
-Then, ask yourself if this is the kind of organization you want to be in, and if it is, make the commitment to rush (indicate interest in pledging) the fraternity or sorority, and if offered a bid (if the fraternity uses bids...my chapter of my fraternity does not), go ahead and pledge.
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"So when they rolled their eyes at me and told me 'I ain't normal,' I always took it as a compliment"--Katrina Elam