Overlooking St James's Square, the ground-floor Neill Malcolm Room was once William Pitt's ballroom. It can be linked to other equally elegant rooms and is ideal for receptions, cocktail parties, dinners and buffet luncheons.

Neill Malcolm Room at Chatham HouseNeill Malcolm Room at Chatham House

Dinner: 40
Reception/buffet 100

6m x 11.5m (extension 6m x 6.3m)