【汉译英】她是社交花蝴蝶。

She is a social butterfly...一般翻译为"她是个交际花"

She is a sociable courtesan.

she is a party girl.

(受雇在社交聚会上接待男客的)交际女伴,交际花, <美俚>妓女

An ancient Greek courtesan or concubine, especially one of a special class of cultivated female companions.
古希腊高等妓女：古希腊的名妓或小妾，尤指受过教育的女性陪伴那一特殊阶层的成员