hmmm from my understanding clubs and societies in schools are just for students to gather and talk/learn more about a particular thing?
i'm not sure if they're going to have formal training per se (i'm pretty sure girls who go into training to become geisha do that full time), so younger ones can definitely join? club activities only happen on wednesdays and weekends, so it's definitely not as intense either way xD
i am NOT the expert on this however, so admins/more knowledgeable people feel free to add your input!