There are several fraternities and sororities on campus, and they all take part in some sort of philanthropy as well as put on campus-wide activities for Greeks and non-Greeks alike. While it may seem like a lot of campus decides to become Greek, there isn't a lot of pressure to pledge one way or another. Some people take issue with Greek life and tend to associate it with stereotypes like constant partying. This is not the case at all. After people explore Greek life for themselves, they will realize that a lot of the stereotypes shown in movies are untrue. There are lots of students who choose to remain independent but still enjoy the company of friends who are Greek.
The housing on campus for Greek life is all within the residence halls. There aren't any houses off campus or otherwise, so the Greeks share the residence halls with independents. This creates a more communal atmosphere and less separation between independents and Greeks. Greeks are, however, all living within their "house," so they are all on the same side of a building and live within close proximity of each other, despite not having off-campus houses.