In the UK a cloakroom may also be a lavatory. The word is often thought to be derived from the French cloaque (sewer). However, it comes from the French cloque meaning travelling cloak.
Attended cloakrooms, or coat checks, are staffed rooms where coats and bags can be stored securely. Typically, a ticket is given to the customer, with a corresponding ticket attached to the garment or item. They are often found in nightclubs. A nominal fee is generally charged, or if not, a tip is usually paid by the customer when they reclaim their item.
The concept of the coat check was initiated by Albert Behar in the New York area shortly after the Depression. Mr. Behar noticed that customers put their coats on the back of their chairs, and offered to store the coats for the customers in a small room adjoining the restaurant.
U.S. Congress 
The United States Congress' cloakrooms are how the parties interact with the member of Congress while they are on the floor, and are used by both the Senate and the House of Representatives. The cloakrooms serve as a place for members to socialize, eat, and take naps without leaving the building. These rooms are closed to all except for Senators and Representatives, and a few of their trusted staffers, and even have their own phone numbers.
In India, cloak rooms are available in all major Railway Stations where railway passengers can keep their luggage for a specific amount of time. Some of the bigger stations have 24 hour manned facilities at railway stations while the smaller have early morning to evening. This often suits day traders or pilgrims coming from smaller towns to larger cities and people waiting for a changeover to another train. Cloak rooms enable passengers to avoid carrying their luggage through the city while they conduct their business or tourism. The facility is operated by the Commercial Department of Indian Railways at all major railway stations; smaller railway stations may not have this facility. A clerk collects the luggage from the passengers alighting from a train at that station or passengers having a train from that station by verifying their tickets. The locked luggage bags are collected and a receipt is issued, mentioning the date and time the luggage was surrendered. The items are then stored on racks in the cloak room. Passengers are advised not to store valuable items or personal effects in the bags. On return, passengers show their receipt, pay the necessary charges to the clerk, and collect their items.
See also 
|Look up cloakroom in Wiktionary, the free dictionary.|