CHKA is the premier downtown martial arts school offering classes in Kenpo Karate and Kickboxing for children and adults 7 d...ays a week. Free weekly women's self-defense "Smash" class every Tuesday at 7 pm. CHKA's educational, business and community partnerships include: Dr. Oz's Healthcorps New York University YMCA Citibabes Preschool International Preschools of New York Neighborhood School...