If Yandere-chan is part of this club, her hair will turn a random color and she will be able to laugh hysterically without being considered suspicious.
Another benefit the player can get for joining this club is the ability to tell jokes, Telling jokes about students (except for the student you're telling the joke to) will increase the player's reputation and damage the reputation of the student the joke is about.
Monday: The Fun Club plays a board game.
Tuesday: The Fun Club plays toy bowling.
Wednesday: The Fun Club spends their time having fun.
Thursday: The Fun Club discusses about recent events.
Friday: The Fun Club helps Zei in her love confession.