Read blog posts about Brazilian jiu jitsu, grappling, and self-defense. Stay up to date on the latest techniques, upcoming tournaments, and seminars as well as strength and conditioning from our experienced Brazilian Jiu Jitsu instructors. DGBJJ offers Brazilian Jiu Jitsu classes at Exton BJJ on Whitford Rd, Berwyn BJJ on Lacaster Ave. & Phoenixville BJJ on Starr St.