don't care about ranking, what are sorority's reps

First things first.. This is Michigan. All of the girls in every sorority care about their grades and no organization is going to be known for having girls who don't put effort into school. The Greek community has a higher average GPA than the university as a whole. That being said, there are houses that are "known" to go out more than others. I would say that you could find a Tri-Delta, Alpha Phi, Kappa, SK or Theta out on any night of the week because they tend to have the most social butterflies (although there are going to be girls from every house that go out either a lot or not at all). If you're looking for more of a comparison, AChiO and ChiO for example have more of the "smart & classy" rep than "super social." Moral of the story is... There's a variety of girls in every house and not one sorority just values one thing.

ADPi, AXO, GPhi, and Pi Phi are the most involved on campus in terms of leadership and extracurriculars