noun
club activities; extracurricular activities
Typically refers to school-based clubs (sports, culture, etc.) that meet after class. Often contrasted with 部活, which implies more intensive, competitive club participation.
See also: 部活
放課後はクラブ活動がある。
I have club activities after school.
彼はクラブ活動でテニスをしている。
He plays tennis in his club activities.