greenroom

(grēn′ro̵̅o̅m′)

noun

a waiting room in some theaters or concert halls, for use by actors or musicians when they are offstage

See greenroom in American Heritage Dictionary 4

noun

A waiting room or lounge for the use of performers when they are offstage, as in a theater or concert hall.

Origin:

Origin: So called because such rooms were originally painted green

link/cite print suggestion box

More from YD