Just wait for College to start. Of the social media tools available, there's nothing better for calendar and social event management.
How do you quickly invite tens, dozens, hundreds of people to a party, rally, debate, play, show, election orsports event and keep them in the loop for time, location, theme updates? What tool do you use to maintain membership to a dozen groups, academic, social, or otherwise?
There's a lot of fluff to Facebook, but for certain use cases, it is untouched.