Is it permissible to work as a cleaner in a cinema, and is the money earned from this work lawful?

Cleaning and preparing a cinema place is intrinsically linked to the impermissibility of working there, because it is considered aiding in sin, which is mentioned in His (the Almighty's) saying: "And do not cooperate in sin and aggression." Therefore, the salary resulting from this work is not permissible for its earner, and he must leave it and seek permissible work.