Betarulz is right. But, Neb. U has a lot of not most of the houses close on Campus as campus is really small due to constraints of where the City, College, and Inter-State is.
A lot depends on land area, price, etc.
A lot of Colleges over the years have grown in land area and surround Greeks who have been there for a long time.
Price dictates whether they can afford to move "Off" Campus so to speak.
Being in the Lime light can be good or can it?
Nearness of the campus is great, except if you have a problem.