green room
n.— «“Green rooms” are not backstage locations where actors relax and apply their make-up: it is the term used for secret meetings of about 25 ministers representing rich nations and poor, each with an advisor whispering in their ear.» —“WTO deals struck in ‘HODs,’ ‘green rooms’” by John Chalmers in Hong Kong Reuters Dec. 17, 2005. (source: Double-Tongued Dictionary)