Kitchens: A kitchen is a room or part of a room used for cooking and food preparation in a dwelling or in a commercial establishment. In the West, a modern residential kitchen is typically equipped with a stove, a sink with hot and cold running water, a refrigerator, counters and kitchen cabinets arranged according to a modular design. Many households have a microwave oven, a dishwasher and other electric appliances. The main function of a kitchen is serving as a location for storing, cooking and preparing food (and doing related tasks such as dishwashing), but it may also be used for dining, entertaining and laundry.
Commercial kitchens are found in restaurants, cafeterias, hotels, hospitals, educational and workplace facilities, army barracks, and similar establishments. These kitchens are generally larger and equipped with bigger and more heavy-duty equipment than a residential kitchen. For example, a large restaurant may have a huge walk-in refrigerator and a large commercial dishwasher machine. Commercial kitchens are generally (in developed countries) subject to public health laws. They are inspected periodically by public-health officials, and forced to close if they do not meet hygienic requirements mandated by law.
Bathrooms: A bathroom is a room in the home for personal hygiene activities, generally containing a sink (basin) and either a bathtub, a shower, or both. In some countries, the toilet is included in this room, for ease of plumbing, whereas other cultures consider this insanitary, and give that fixture a room of its own.
Historically, bathing was often a collective activity, which took place in public baths. In some countries the shared social aspect of cleansing the body is still important, as for example with sento in Japan and saunas in Finland.
In North American English the word “bathroom” may be used to mean any room containing a toilet, even a public toilet (although in the United States this is more commonly called a restroom and in Canada a washroom).