So they start a men's class. And, tout suite, a women's class. Taught by a qualified female aikidoka already in the dojo. There is one, isn't there? Hmm. Maybe a men's dojo and a women's dojo? But wait, why dont we map separation to race? Economics? All social differences all at once? Free private lessons only and for all, with the sensei, and sensei better fit the individual student's mapping. That's going to take a lot of senseis.
I suppose if that meant we got to keep up the toilet seat...