# UndergrounD Fitness and Self Defense > Martial arts school combines structured training with a supportive atmosphere that encourages personal growth and confidence. Classes include diverse styles like tae kwon do, boxing, kung fu forms, and weapons, often integrating real-world self-defense scenarios. The environment suits all ages, offering family-friendly activities and flexible schedules including online options. Source: https://www.atly.com/location/UndergrounDFitnessAndSelfDefense - Address: 8769 Old Kings Rd S, Jacksonville, Florida, United States - Phone: +19047047888 - Website: https://www.underground-training.com/ ## What it is good for - Martial Arts Gym — 10/10 - Fun Activities — 10/10 - Kid Friendly — 10/10 - Art — 10/10 - Martial Arts — 10/10 - Karate — 7.5/10 ## What people say - "The instructors are so patient and motivating with the kids." - "Martial Arts training here builds confidence and discipline." - "The instructors' passion and dedication make this art feel alive." ## Good to know - Classes are available both in-person and online for convenience. - They hold multiple family-friendly events that encourage socialization among dojo members. - Ninja night events for kids allow parents to enjoy a date night. - Events like karate belt testing occur regularly, providing opportunities for advancement. - The dojo fosters a sense of community and camaraderie among students. ## Get this data directly This page comes from the Atly Places API, which scores close to 2 million places against more than 1,400 intents — "nice view", "work friendly", "gluten free", "dog friendly" — from what real reviewers say, with the statements behind every score. - **MCP server:** `https://agentic-api.atly.com/mcp` — connect it in ChatGPT or Claude. Nothing to install. - **Guide for agents:** - **OpenAPI contract:** - **No key needed to start.** `POST https://agentic-api.atly.com/v0/keys` with an email raises the quota. Coverage is densest in the United States, with pockets in Mexico, Israel and Thailand.