While it can depend upon the sorority, many sororities, particularly in the south, encourage a 'Party on Saturday, Pray on Sunday' attitude, where these social settings are where they are supposed to seek out husbands. In doing so, many of them will participate in fringe fashions that supposedly run counter to their 'conservative values', ultimately because they are not wholly adopted culturally or ideologically, but purely performatively. In doing this performance, this is part of the process that can potentially move these styles into the popular bourgeoise culture, because it is about the woman wearing the outfit, not the outfit wearing the woman.

Current feminist theory often discusses the contradictions this creates within a patriarchal society, as it is simultaneously a rejection from normative patriarchal definitions of fashion, but is simultaneously only acceptable within those norms, specifically within the male-gaze. Essentially, one can deviate, but only within the acceptable tolerance margins, and only for a specific time period.

Edit: I don't really buy into that personally. My personal opinion is that pretty much all values in the U.S. at this moment are mostly post-hoc rationalizations of reactionary nihilism, with maybe a skeleton of an ideological framework.

I replayed it a year or two ago after all the patches and the grind wasn't so bad, but I remember it being awful when I played at launch.