However, the fraternity and (especially) sorority racial segregation phenomenon is hardly unique to southern universities. Unfortunately, it is common all over the country, though there are chapters at some universities which are much better racially integrated.
If that is of concern to the OP, he may want to check the chapter photo albums at the fraternity systems at the various universities under consideration. Also, the sorority ones, due to fraternity social life often being in close association with sororities and their members.