My alma mater, the University of Montevallo, was a women's school until the mid-'60s and had similar rules for quite a few years even after men were admitted. One of the funnier regulations (which I admit could be an urban legend) was that when a male student visited a female in the downstairs sitting area of her dorm, they had to sit a specific number of inches apart; supposedly, the dorm mother would check in from time to time and, if she thought they were getting too close, whip out a ruler to verify the distance between them.