I don't know about any documentaries, but I have read a book called "Pledged" by Alexandra Robbins that follwed three soroity women for a year. Coming from a Northern Sorority with and open mind on a campus that has a somewhat different Greek environment than most campuses, I found it to be interesting. Friends of mine that are members on other campuses have not liked the book, but i think it gives an interesting look into sorority life. Not all of it is pretty, not all of it is nice, but as a current active, I can relate to many of the things the women in the book go through.
Pick it up if you want a "documentary" in book form
