Back room and Offstage

Back room noun - A room located in the rear of an establishment; usually accessible only to privileged groups.

Offstage and back room are semantically related. In some cases you can use "Offstage" instead an adjective phrase "Back room".

Offstage adjective - Situated or taking place in the area of a stage not visible to the audience.

Back room and offstage are semantically related. Sometimes you can replace phrase "Back room" with "Offstage", this terms are similar.