why would you care how many dojo train in atemi? budo isn't a group thing. it's mostly personal, as in, for that person only.
But that person, learns from the dojo, and what the dojo teaches will stay with that person for the rest of his martial practice. All martial arts moves from the dojo, whether it be big, small or modern, therefore the practices in the dojo must be constantly examined for any flaws and weaknesses. Why do you think finding a good dojo is such a priority for martial artists?