The word "backroom" refers to an area or room located behind or away from the public space. It is often used to describe a place where private discussions, activities, or operations take place out of the view of others. Full definition
It's good to see an article on Stan getting a new team of backroom staff in, 4 in all and Raul from Barca will become Dein's replacement and the long awaited DOF but give the man a break eh mate! (justarsenal.com)
While AB 934 was once an honest attempt to support effective teachers and prioritize quality in California's education system, the bill is now the product of backroom deals in the state capital with the state's most powerful special interest groups. (studentsmatter.org)