In my health psych class, there are about 90 or so people in the class and off the top of my head I know there are at least 2 Kappa's, 3 Phi Mu's, 1 Phi Delt, a handful of AKL's, 2 or 3 DG's, some Zeta's, a KD, a Lambda Chi, and a couple of Chi O's. That's just the people I know of though, i am sure there are many more.
Stat is a huge lecture and I am sure at least 50% of the class is greek, if not more.
My women's studies class there is a Pi Phi, and then me and one of my sisters.
In my rural sociology class, I am the only greek. But it's also a night class with all adults so that's probably why.