The website in question seems to be down. What are the morning class times? Any chance of the contact email being posted sometime?
Really nice, English-speaking, foreigner-friendly hapkido dojang!
Directions: Get off at subway stop 209 (Gwangan). Head straight out exit #5. You will go 3 or so blocks. You will pass a gas station and a Honda dealership. The dojang is to your left. There is a big sign blue, white, and red sign that says English Hapkido School.
http://www.hapkido.to (under construction but there is an email).
Schedule: M-F, morning classes, and 8-9pm, 9:30-10:30pm.