During the U.S. Republican National Convention in Chicago, U.S. Republican Party leaders gathered in a room at the Blackstone Hotel to come to a consensus on their candidate for the U.S. presidential election, leading the Associated Press to first coin the political phrase 'smoke-filled room'.

Smoke-filled room
Associated Press
United States presidential election, 1920
Blackstone Hotel
Republican Party (United States)
1920 Republican National Convention