Register for Martial Arts & Self-Defense Classes in TN & KY
Ready to master practical self-defense, traditional Ninjutsu, and close-quarters combat? Use the form below to inquire about class availability or to claim your free introductory class. Black Scorpion Ninjutsu Society offers expert adult martial arts instruction (ages 18+) with active training groups in Nashville, Madison, and Lebanon, Tennessee. We also host established weekly sessions at Beaver Creek Park in Glasgow, Kentucky. Fill out your details, select your preferred location, and we will reach out within 24 hours to get you started.
Bobby Calvert, widely known as "Ninja Bob," is a Nashville-based martial artist, fitness coach, and community entrepreneur.
Here is what our students have to say about their training experience.
Kole Barnes
Rating: 5/5 Stars "I’ve trained with Bobby Calvert for many years, starting out with Ninja Bob when I was just 19 years old. Thanks to his expert guidance in both our indoor and outdoor martial arts classes, I won a 1st and 2nd place trophy in my very first tournament and have achieved countless milestones over the years. Bobby is an exceptional instructor and mentor!"
Laura Culbert
Rating: 5/5 Stars "Training indoors and outdoors with Ninja Bob has completely transformed my fitness. Between the high-energy self-defense drills, incredible weight loss, and the added focus of learning archery, Bobby Calvert's classes keep me challenged and engaged every week. An amazing mentor and program!"
Marlin Mathis
Rating: 5/5 Stars "I've learned more about practical self-defense in these park classes with Bobby Calvert than I ever expected. Moving outdoors builds real-world confidence and keeps the conditioning intense. Ninja Bob is a top-tier teacher with a wealth of traditional and modern knowledge."
Steven Smith
Rating: 5/5 Stars "Solid instruction and an awesome atmosphere out in the park. Bobby doesn't rely on gimmicks—he teaches hard-hitting, functional self-defense. Training under the open sky on uneven ground really tests your application, and Ninja Bob makes sure you get the most out of every minute."
DeAndre Huff
Rating: 5/5 Stars "Solid striking arts, incredible self-defense curriculum, and a great mentor in Bobby Calvert. Ninja Bob doesn't waste your time with useless fluff—everything taught has a purpose. If you're serious about leveling up your skills in Nashville, check out Black Scorpion Ninjutsu Society."
Allen Tatum
Rating: 5/5 Stars "I can't say enough good things about Bobby Calvert and the Black Scorpion Ninjutsu Society. The instruction is practical, direct, and rooted in solid principles. Ninja Bob pushes you to be your best while maintaining a great sense of humor. Five stars all around!"
Call or text: (615) 930-1708
Bobby Calvert aka Ninja Bob is on Facebook!