Alumni Associations limited in ways that chapters can't?

[naraht]

Originally Posted by ree-Xi

OP - Are you saying that such sub-groups do exist and are looking for evidence in other Fraternities/Sororities, or are you asking if such sub-groups exist at all?

I'm trying to find comparisons to the situation in Alpha Phi Omega where there are geographic Alumni Associations which are restricted to only men, even though most chapters are co-ed.