The Sket Dan Clubroom (スケット団部室, Sketto dan bushitsu) is the Sket Dan's base of operations and where the members spend much of their time. It contains individual lockers for each member, a corner for Himeko's tea set, a space for Bossun's tatami mat and a whiteboard, among other things. A banner on the wall shows both the club's logo and motto. There was a bench placed in front of the desks, but broken by Himeko in episode 22 and replaced by a sofa from Yoshihiko.

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