Three fire engines and 14 firefighters and officers were called to a fire at a derelict hall in Brow Crescent in Orpington,
The hall was gutted by the blaze.
The Brigade was called at 2101 and the fire was under control at 2318. Fire crews from Orpington and Bromley fire stations attended the scene.
The cause of the fire is under investigation by the Brigade and Metropolitan Police Service.