The Stronghold San Diego Crossfit and Brazilian Jiu Jitsu will be hosting a 2 day seminar on December 5-6 with 4x BJJ World Champion Rubens “Cobrinha” Charles. While I have not trained at Stronghold, I hear great things about the group! They are are affiliated with Roy Harris so they must be top notch Brazilian Jiu Jitsu practioners and instructors. For more information about Stronghold San Diego or their upcoming seminar, please visit the Stronghold website!