I studied Tae Kwon Do for over 20 years. It's a great sport and is full of solid self defense training, atleast at the advanced level (contrary to popular belief) but it is definitely not the right kind of training for self defense in confined spaces. Hapkido would not be bad for those purposes and some TKD schools (the ones focused more on defense and less on sport and fitness) also teach Hapkido since it is also a Korean art.