理 - リ, ことわり
reason, logic, arrangement, justice
容 - ヨウ, い・れる
contain, form, looks
Contrast the rather tidy and sensible haircuts implied by the kanji 理容 with the word for a ladies' hairdresser's: 美容室 (biyoushitsu). This does also have the general sense of beauty parlour. These days younger men are getting their hair done at a 美容室 anyway... Some other related words:
美容 - biyou - beauty of figure or form.
美容院 - biyouin - this word also means a hairdresser's or beauty parlour.
美容師 - biyoushi - hairdresser or beautician.