suffix
association; club; friends of ...
Suffix attached to a name or group to form the name of an association or club, often used in organization names like 〇〇友会.
来月、地域の音楽友会の集まりがあります。
Next month, there is a gathering of the local music friends' association.
彼は大学の同窓会の代わりに、学科の友会を立ち上げた。
Instead of the university alumni association, he started a departmental friends' club.