燕尾服是WHITE TIE, 非常FORMAL(正式)的场合
BLACK TIE指的是SEMI-FORMAL(半正式),像学校一年一度的晚宴啦,都属这种, 普通的EVENING JACKET加领带就可以了..即传统的西装领带之类的…A “formal” or white tie dress code typically means tail-coats for men and full-length evening dresses for women. “Semi-formal” has a much less precise definition but typically means an evening jacket and tie for men (known as black tie) and a dress for women. “Business casual” typically means not wearing jeans or track suits, but wearing instead collared shirts, and more country trousers (not black, but more relaxed, including things such as corduroy). “Casual” typically just means clothing for the torso, legs and shoes. “Wedding Casual” defines yet another mode of dress, where guests dress respectfully, but not necessarily fancily. Basically, no jeans and T-shirts.
Transparent or semi-transparent clothing can play with the boundaries of dress-codes regarding modesty.
Dress codes usually set forth a lower bound on body covering. However, sometimes it can specify the opposite, for example, in UK gay jargon, dress code, means people who dress in a militaristic manner. Dress code nights in nightclubs, and elsewhere, are deemed to specifically target people who have militaristic fetishes (e.g. leather/skinhead men).