Perhaps trainers who were fond of a particular type would all rally around one remarkably killed leader of some kind.

They might, one supposes, form organizations in which they all trained together for the promotion of their interests.

What would they call such a facility? Perhaps a gymnasium, given that facilities of that name are already used for training human bodies.

I’d imagine any particular region could support 8 of them. Not sure where I got that number, just pulling it out of nowhere.