bums on seats

Từ điển Oxford Advanced Learner 8th

bums on ˈseats idiom
(BrE, informal)used to refer to the number of people who attend a show, talk, etc, especially when emphasizing the need or desire to attract a large number
•They're not bothered about attracting the right audience— they just want bums on seats.
Main entry: ↑bum_idiom