Well, the only people I ever see are in my major. So my senior meteorology class includes:
1 KD (myself)
1 Kappa
1 Phi Mu Alpha
2 Sigma Chis
1 Pi Phi
In some of my classes that the juniors mix into, we've got a Phi Sig, a handful of Tri-Delts, a Sig Ep, and a Gamma Phi
In my class for the honors college, it's just me and a Pi Phi (same one as up there). We get funny looks for wearing our letters
Too bad the all-sorority GPA is a 3.3, and they don't know that!