[待更新] Main Street Martial Arts previously Napa Valley Martial Arts is located at 144 South Coombs Street in Napa, California. Students ages 14 through adult can choose between Tae Kwon Do and Kenpo/Jeet Kune Do for their training. Our Combat self-defense and fitness program allows you to burn calories, get in shape and program your body to react properly if the need arises.for ages 4 through 16 Adult Mixed Martial Arts for Street Application Fully Equipped 5,000 sq. ft....