| Madison Hotel|
|A luxury hotel which hosts the (probably) annual USA meeting of Le Cercle.|
The Madison was constructed by developer Marshall Coyne, along with the adjoining 100,000 sq ft, Madison Office Building. The hotel was opened in February 1963, by President John F. Kennedy. The hotel has hosted every President of the United States since then. 
Coyne was on the board of the Foreign Policy Association, which often held its Ambassadorial Roundtable at the hotel. He also served on the boards of the American Academy of Diplomacy at the State Department, Georgetown University, the Center for Strategic International Studies, the Kennedy Center and the James Madison Council of the Library of Congress, and a member of the Washington Hebrew Congregation.
During the Middle East peace talks in 1979 that led to the Camp David accords, the official delegations from Israel and Egypt stayed at the Madison. And in 1987, when President Ronald Reagan and Mikhail S. Gorbachev of the Soviet Union met in the capital, the hotel was transformed into a sort of Western Kremlin. The hotel was declared a temporary foreign mission during the week of the summit, with hundreds of Soviet officials occupying the top six floors.
Given all the high level activity at the hotel, it would presumably have had pre-installed surveillance equipment.
Loews Hotels assumed management of the hotel in April 2006, then it was sold to The Jamestown Group in January 2011 and Destination Hotels & Resorts assumed management from Loews. The group renovated the property in 2012, as a cost of $22 million. Loews Corp approached The Jamestown Group and offered to buy the hotel, and the sale was completed for approximately $145 million in December 2012. The hotel rejoined the Loews chain in January 2013. In September 2017, Loews sold the hotel to Walton Street Capital, and it has been managed by Hilton Hotels & Resorts since 2017. 
|Le Cercle/1979 (Washington)||start/end dates uncertain|
|Le Cercle/1980 (Washington)|