I cannot swear to it, but I think Penn St. goes hands down.
For those that worry about the numbers, it depends on may things.
1. # of Students.
2. Campus feeling towards Greeks, Penn., A+++++s
3. School feelings towards Greeks, again A +++++s.
4. % of Greeks compared to students.
I wish more Schools had the same working relation between them and Greeks.
It seems GLOs on Campus are working with each other in a more posotive way!