dont take this the wrong way, but why do you think this way? youre not the only one who thinks like this, and this is what keeps the positive growth between clubs/gyms/affiliations from forming relationships with one another and sets a precedence for segregation between schools/people in jiu jitsu.
we are all doing the same thing that we all love, there should be no reason why one person from one gym cant wear his gi or patch while training at another gym. everyone always talks about greeting different members from different gyms with open arms, or a good ol' fashioned invite to open mat whenever. but then there is this particular mentality from students of other masters/coaches that think they arent welcome to another affiliation because of where they train...?
i apologize for getting on a soapbox in this thread, and practically leading it astray, but part of what i love about jiu jitsu is the ability to go literally ANYWHERE, regardless of where i train on a regular basis, and the knowledge that my coach and training partners are working hard to build bonds between themselves and countless other individuals from across the globe because of their love of this sport. i have met, and continue to do so, some of the best people and friends i know because of my relationship with jiu jitsu.
this mentality of being an outsider doesnt belong, and nobody should ever turn anyone else away because their affiliation and location determine whether they train somewhere different. were i to have shown up to this seminar, i would sport my club proudly, and let it be known that i traveled far and wide to gain an opportunity to train and learn from the best in the world, regardless of who my coaches are.