Introduction: CHKA is the premier downtown martial arts school that is offering classes in kenpo karate and kickboxing for children and adults 7 days a week. Free weekly women's self-defense "smash" class is available every Tuesday at 7 p.m. Academy-trained instructors are available for private lessons, group classes, and on-site workshops and seminars. Full schedule of classes at our East Village Studio. Head instructor Sifu Jack F.C. Shamburger is a 3rd generation martial arts grand master and a US marine. He was given his own system, Chinese Hawaiian Kenpo, in 1990 by grand master Al Tracy of Tracy's International Kenpo Studios, and has been training the men, women, and children of NYC ever since. There are CHKA affiliate schools all over the country and the world.