Marin Mixed Martial Arts is offers instruction in muay Thai kickboxing, wrestling, boxing, jiu jitsu and mixed martial arts. It offers regular classes for adults and children, with open mat on Friday nights. They also take part in the World Jiu Jitsu Championships (aka the Mundials) and other martial arts competitions. The owner of Marin Martial Arts is a Ralph Gracie-trained Brazillian jiu jitsu black belt with fifteen years of teaching experience.