In short, Greek organizations are not available. The school does not have any fraternities or sororities that are supported by the school. There are, however, two unofficial fraternities that occasionally throw parties—Kappa Sigma and Psi Upsilon. There is also an unofficial sorority, Kappa Gamma Sigma, but it is even more low-key than the fraternities.
There is not much effort put into promoting the fraternities and sorority, so being involved in the "Greek" life is not big on campus. Being a part of a fraternity or sorority is a miniscule choice and not in any way a pivotal necessity at the University.