One gym can hardly contain Master Solomon Brenner's martial-arts expertise, which is why his school—Action Karate—has expanded to 13 different locations. Brenner believes that the martial arts are a lifelong pursuit, so he takes on students aged 3–93.
His classes for kids blend fitness with self-discipline, whereas his classes for adults focus on toning exercises and self-defense. Not all of his classes involve combat; some dedicate entire hours to pure strength training or cool-pose striking. He and his staff also host birthday parties for kids, which include fun martial-arts instruction, games, and a ceremonial slicing of birthday cake with a samurai sword.