Hwa Rang Kwan Martial Arts Center
371 5th St, San Francisco, CA 94107
HRK offers lots of different classes for all different levels. The instructors are very professional and knowledgeable but make you feel comfortable as well. The facility is clean: 3 bathrooms (one with shower), two workout areas, punching bags, exercise machines, waiting area, 2 dressing rooms. The class fees are very competitive and there are TKD classes every day of the week. Finally, the location is accessible by both bus and BART.