This is a little out of our normal discussion, but not wholly inappropriate. Most folks seek out the classic martial arts schools. While usefull, remember that many have evolved into highly structured sports. Judo and ju-jitso are two very different children from the same parent! There are numerous courses geared to 'street smart survival.' Find one that is realistic, teaches a heavy dose of street smarts and awareness ( avoiding trouble is so much easier.) I avoid any instructor with a 'colorfull' persona. My Judo sensai was a 5' 80y/o priest-who delighted in tossing me around at will LOL