The hangout-chair is a chair in the Artist hangout. The description is "[if the sweater is on the hangout-chair]Gus's sweater hangs on the back of the chair.[otherwise]It's a chair like all the other chairs in the club.[end if]".
The printed name of the hangout-chair is "chair".
Understand "chair" as the hangout-chair.
Instead of pushing the hangout-chair to when the sweater is on the hangout-chair:
say "Pushing the chair would make taking the sweater even more obvious."