After WWII, no prestigous institution of higher learning banned a greek system until Williams College in 1968. Then there was a pause until the 1980s. Then its started; Amherst, Bowdoin, Colby, Franklin & Marshall, and others either banned their greek systems, or forced them to go co-ed or banned them outright.
The greek system at F&M never went away. The administration at F&M decided to act responsibly, and negotiate the rerecognition of their greek system with alumni and the faculty. Technically, this has not happened yet, but its as good as done.
Check out this job opening at F&M:
http://www.fandm.edu/Departments/Per...DeanGreek.html
You don't create such a position for an unrecognized greek system.