The Grimaldi School of Clowning for Boys is a school that Steve attends in "The Mural of the Story".
Roger, posing as a professor at the school abuses Steve, telling him his act sucks despite his best efforts. When he offers Steve a chance to go to an exclusive retreat, he works himself raw in order to go. However, Roger reveals that Steve never had a chance of being selected and had used him to motivate Gumdrop, whom he had his eye on after since he saw him make a banana disappear. Steve files a false complaint of being physically abused and gets Roger's clown teaching license revoked.