Ariesrising,
my fraternity has only roman catholic members. But that's way over here in Europe. It has historical reasons.The fraternity my chapter belongs to was formed during the middle of the 19th century at a time when catholics had a bad standing in a protestant/prussian dominated Germany. However, what comes closest to us in the Americas are the social and not the religious fraternities.
You can find more information on my fraternity on our homepage.
http://www.kdstv-bodensee.de
It is also available in English, so don't worry about language problems.