So What? I've never run into anyone who had any connections with their Sorority sisters or Fraternity bros outside of their chapter and 4 years of their pledge year. It's no different than joining Rotary, or the Elks club in your hometown. The sooner you figure out that there are good ways to develop a social circle faster, the better off you are going to be.
You EARNED your reputation. Deal with it. Own it, and if you changed explain how if they bring it up.
You need a wider social circle or a Public relations firm .
But showing up to the Sorority annual conclave for 15 years straight to try to score some tail would be a bad move onyour part...