Hapkido ("the art of coordinated power" in Korean) is a complete martial art that uses:

• practical self-defense escapes
• joint-locking techniques like Aikido
• throws, chokes and finishes like Jiu-jutsu or Judo
• kicks and punches like Taekwondo or Karate
• ground-fighting techniques like Brazilian Jiu-Jitsu
• defense against weapons and armed attackers

In addition, Hapkido emphasizes learning how to fall safely and how to use an attacker's own force against himself, instead of trying to match it with our own strength. Hapkido is also a traditional martial art that emphasizes the Five Tenets (courtesy, integrity, preseverence, self-control and an indomitable spirit).

And of course, it is a good way meet good people, get in shape and have fun too.