noun
paid drinking outing; getting paid to go out drinking
Modern slang for an arrangement where someone, often a woman, is paid a set fee (typically to cover taxi fare home) to accompany others drinking. Common in social media and dating-app contexts.
See also: ギャラ
彼女は週末にギャラ飲みでお小遣いを稼いでいる。
She earns pocket money on weekends through paid drinking outings.
ギャラ飲みの相場はタクシー代程度らしい。
The going rate for paid drinking outings seems to be about the cost of a taxi ride home.