Dictionary
back' room'
1. a room located in the rear, esp. one used only by certain people.
2. a place where powerful or influential persons, esp. politicians, meet to plan secretly or from which they exercise control in an indirect manner:
The candidate for mayor was chosen in the precincts' back rooms. Also,back'room'.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.