When you first come to Wesleyan, you might be seduced by the frat lifestyle—you'll go to a frat on your first night out, drink out of a keg, and say to yourself: "Ah, so THIS is college." Well, it may be "college," but it's not really "Wesleyan." Many people never go back after that first time during orientation; it's just not how most Wes kids roll. That being said, the frats are there if you want them, and there are always events going on on the weekends that are open to everyone.
The more "bro"-like frats will host parties and the occasional concert, and Eclectic ("hipster" program house, open to men and women) throws mad concerts all of the time. The newly formed "RhoEp" (Rho Epsilon Pi), Wesleyan's only sorority, is mostly still in its formative stages and does not have a house yet, but it still collaborates with the frats for events. While Greek life is certainly mocked by non-Greeks on a regular basis, there is no real animosity between them and the rest of campus, and they can definitely be the source of a good time if that's your thing.