DJ's Martial Arts & Fitness located in the Laurel District of Oakland, CA was established by Professor Doug Jones over 20 years ago. The school teaches the martial arts style of Wun Hop Kuen Do. Grandmaster Doug is an 9th degree Black Sash under the guidance of Senior Grand Master Al Dacascos. Wun Hop Kuen Do is a style that incorporates the best from many styles. A system without a system. It is in continual growth. It has clearly always been a mixed martial art.