Sorority alumnae contribute more to their alma maters and have a stronger commitment to their universities. Greeks play a bigger role in civic groups, religious organizations and volunteer activities than non-Greeks. They're also more likely to stay active after graduation. Congress are Greek. Belonging to a sorority can enrich your college and alumna years.
Membership is a privilege and responsibilities go with that privilege.
You should be willing to give as well as to receive. What you get from an association of any kind is usually measured by what you put into it.