The only possible example I can think of is if a group of alumnae from a certain CHAPTER of Chi Omega chose to exist with only alumnae from said active chapter. I know of no such example for any "official" alumnae chapter, but I can imagine it is out there.
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XΩ Alumna --45 Year member
ΦΑΘ Alumna
ΚΔΕ Alumna
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