Well, colleges and universities are doing "different" things these days.
I'm sure with the informationals, secrets aren't being revealed.
It could be a way for the Pan-Hell orgs to collectively give general information about their respective organization and events scheduled for the semester/year.
Maybe someone from an HBCU where this occurs can enlighten you more. I'm not too shocked or surprised anymore about the goings on at colleges and universities these days.
Why didn't you ask someone handing out the flyer/calendar while you were there?