PARTYa party, usually in the early evening, at which alcoholic drinks are served and for which people usually dress formally 鸡尾酒会
Examples from the Corpus
cocktail party• But the big scene happens at a cocktail party in the home of a famous plastic surgeon.• Most of the Hodgkins keep you moving, backing off, like a cocktail party guest in search of a sober conversation.• A cocktail party has been planned for March 7 and many of the villagers will be invited.