hostess; nightclub hostess
Idiomatic expression for a woman who works as a hostess in bars, cabarets, or nightclubs, likening her to a butterfly flitting through the nightlife.
She works as a hostess in Ginza.
A district where nightclub hostesses flit about glamorously.
Compound of 夜 (night) + の (possessive particle) + 蝶 (butterfly). The metaphorical use for a nightclub hostess is a modern Japanese coinage, not a direct translation of any Western phrase.