The Greek life on campus is not as big as it might be on other campuses, but it is still present, especially when the Greeks put on a program for everyone's enjoyment. During Rush Week, the Greeks almost invade the campus, and that is when they are most evident since they wear their letters and are seen with all the students who choose to rush all week. It is actually encouraged for everyone to attend Rush Week if only for the experience.
The Greek programs do tend to focus on philanthropy. For instance, Alpha Chi Omega works with Take Back the Night to fight sexual assault and violence. There is no real housing for the Greeks, but they are certainly welcome to request each other as roommates or suitemates.