As an undergrad I attended BC (Go Eagles). There are no chapters of greek life on campus at all. As someone said, there are city wide chapters of sororities and frats but none in house at BC. I think the reasoning is several things. Liability for having a greek life system when we(as BC students) have a prominent drinking culture. Also, as other catholic schools don't have greek life, they streamline with other catholic institutions.
There was a question about whether BC students miss greeklife. Generally I would say no. I would have loved to go greek as an undergrad but that didn't happen and there's no love lost. There are so many things to do on campus that greeklife would just be more on top.
But back to the original poster, I might be able to help. I graduated 2003