When I went to college, I had no plans to rush. No one in my family had ever joined a fraternity or sorority, and all I knew of the greek system came from movies like Animal House.
My school set aside an entire week, before classes started, for rush - and for that week, the only thing to do *was* rush. So I figured I'd give it a whirl.
I wound up getting totally sold on the greek system, the sisterhood, the community service, the academic programs, etc... but I was equally convinced that none of the national sororities on campus were for me. Luckily there was a new local sorority holding its first rush the following week. I went to their first rush party, and within a few minutes I knew I'd found my sisters.