The Dwight Schrute Gym for Muscles first appeared in the season 8 episode, Mrs. California. Dwight mentions to Darryl that there is a new gym opening up however, upon entering the gym Darryl finds that the gym is filled with strange workouts like book ripping and gravel bucket lifting. After Darryl tells Dwight to make a real gym, Dwight gets some real equipment.

The only known members of the gym are Darryl and Gabe. 

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