So if you already don't know, I run a bjj club at my university (been up for 4 years now, but I've only been part of it for the last 3 years) and noticed that we have a HUGE dropout rate. i.e. a ton of people will come to try it out and then after a few weeks the attendance will be 25% to 10% of the first class. Now I look at the other clubs on campus (specifically capoera, wing chun, and taekwondo) and notice that they have an insane amount of people CONSISTENTLY going to class. What are they doing differently that attracts more people?