[Tom Earp]

I think it depends on the school, size and costs.

I think also that the term suites is mis used. It is more like a Dorm Section for each Sorority and is called their suites per say.

It may be as you say for safety sake, but on most major campuses I think Sororitys do have houses.

In most of the Kansas State colleges if not all, they do have houses.