<p>I’m not in any martial arts clubs myself, at least not at the moment (I’m a rising senior), but half my friends are in the American Jiu-Jitsu Club, which always welcomes new people. Martial arts are extremely popular at MIT, and there’s a huge number of disciplines/styles offered. There’s both a taekwondo club and a varsity taekwondo team, and I think both of them allow people at all levels to join, and both of them are pretty hardcore about the rigor of practices, etc. I think both attend competitions, though you might want to double-check about the club. The varsity team is top-notch, one of the best in the country I believe.</p>