Here is my question: What if a practitioner from another style came to your school, and just wanted to work out with your class, on a regular basis (lets say as often as you meet in a week), but had no interest in advancing in your style? He just wants to work out, learn the techniques, applications, etc. Would you allow this? How would you approach it? What belt would you require them to wear? I wanted to throw this out, and see what you all thought. I think it would be interesting to have such a subject in a class. Excellent question! I would allow it. I would tell the student that for the purpose of letting other people in the dojo know his skill and knowledge level, he would have to wear the rank belt I assign him. The belt I would assign all depends on his skill level. In truth he is advancing in your style because as he is ready for next level of techniques he will be taught them. It makes no difference in my dojo as I have no testing fees etc or have any affiliations with any type of organizations. I don't even give out certificates to students. I guess your question applies differently to commercial, profit driven, and affiliated schools. Those schools often charge students for rank. So this student get to advance without the fees associated with gaining rank (testing, belt, certificate, and registration charges). Is that fair, that an outside student pays less and inside student pays more? If your regular students don't care about the rank advancement in your style or organization will they ask for the same? I think they will and they should. Also note that this depends on your teaching structure. If you allow your students to learn whatever they can without adhering to strict syllabus. For example these are green belt techniques so only green belts and above practice them. I was once part of a school where you learned advanced sets that were not required for the rank I was currently in. So I was very happy with not testing. I wasn't losing out on anything except testing fees. I look forward to hear what others have to say.