The Gamma Hexagon chapter of Phi Sigma Kappa at Robert Morris University is the oldest active fraternity on campus, and it continues to grow. The Phi Sigs instill in their members leadership skills beneficial to their careers and lives and give them every opportunity to use them. Phi Sigma Kappa is a lifelong brotherhood dedicated to the betterment of the individual, the University community and our world. In 1971, the Gamma Hexagon chapter was established at RMU. Nationally, Don Knotts, Frank Gifford, Cheech Marin and Dan Patrick are among the alumni of the fraternity.