I never participated on a parent page for SCU. BUT, when my kid was there, the Greek groups usually had very open events. My daughter did not go greek, but she still attended a number of formal events and other things the Greek groups did.
She graduated in 2010, so I don’t know if that has changed…I hope not.
She says the Greek groups were really inclusive.
In addition, my kid says there was still plenty to do. It’s not like the Greek groups dominated the social life at SCU.