The Club Competition is a two-day event where five Clubs compete against each other for Gem Rewards. Participation is easy! A Club must simply Qualify on the first day and then Compete the following day against the four other Clubs. Clubs earn Gem rewards at the end of the competition based on their rank amongst the 5 Clubs.
Competitions can be accessed by tapping the “Competition” button in the bottom left corner of the Club Island screen: