1) Backstage area 2) Backstage waiting spot 3) Place to wait before going on 4) Room 5) Theatric meeting place 6) Where concert musicians relax 1) Lounge 
• (n.) The retiring room of actors and actresses in a theater.
A room backstage, often licensed, in which the company can sit and relax before, during or after a show. Once common, greenrooms are rarely found in modern theatres.
Green'room` (grēn'room`) noun The retiring room of actors and actresses in a theater. 
[n] - a backstage room in a theater where performers rest or have visitors
noun a backstage room in a theater where performers rest or have visitors
A room backstage, occasionally licensed, in which the company can sit and relax before, during or after a show. There'll always be a kettle there, if nothing else! Not as common as they used to be.