[honeychile]

I am wracking my brain for exactly where, but there are (or were) campuses where clubs called Stray Greeks or such are set up for Greeks who transferred and find themselves in your situation. There is no exchange of ritual, of course, but they still try to participate in charities and such. This is/was popular when universities had more than one campus, and the major of students transferred to the main campus for their junior and senior years.

Maybe that would be a way for you to go.