Correction Tom Earp - one of the schools in the old SWC is in the SEC now - Arkansas, where the tradition to dress nicely at all social event - be it a football game or a night out - is still very much in effect.
EW - I sometimes gasp audibly when you make statements like the one (and I know this is not verbatim) where you said, "Greeks dress up because it is the way we were raised. " I have to disagree with you since I was born and raised in Arkansas (LR, Heights area) and was Greek on that campus. Not every Greek comes to campus from the circles you are implying they come from...but they dress appropriately due to the tradition and social customs of the environment they have entered.