count noses

Translations
пересчитывать людей
Before leaving the event, make sure to count noses to ensure everyone is present.
Перед уходом с мероприятия убедитесь, что все присутствуют, пересчитайте людей.
Definitions
To count the number of people present, usually by physically counting each person; often used informally to refer to taking attendance or determining how many people are in a group.