my experience is that these days not everyone (collegians) even know there are 26 groups, much less what they all are.
I learned there were 26 but I never learned all of their names. I could probably have come up with 15 of them in undergrad and all 26 now (with a bit of thought) that I've been on GC.
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From the SigmaTo the K!
Polyamorous, Pansexual and Proud of it! It Gets Better