cloak ‧ room /ˈkləʊkrʊm, -ruːm $ ˈkloʊk-/ BrE AmE noun [countable]
1 . a small room where you can leave your coat SYN coatroom American English
2 . British English a room in a public building where there are toilets – used when you want to be polite SYN rest room American English :
Where’s the ladies’ cloakroom?