What is Buffet?

Legal Definition
A buffet (IPA: [ˈbʊfeɪ] in UK, IPA: [bəˈfeɪ] in US, from French: sideboard) is a system of serving meals in which food is placed in a public area where the diners generally serve themselves. Buffets are offered at various places including hotels, restaurants and many social events. Buffet restaurants normally offer all-you-can-eat (AYCE) food for a set price. Buffets usually have some hot dishes, so the term cold buffet (see Smörgåsbord) has been developed to describe formats lacking hot food. Hot or cold buffets usually involve dishware and utensils, but a finger buffet is an array of foods that are designed to be small and easily consumed only by hand, including cupcakes, slices of pizza, foods on cocktail sticks, etc.

The essential feature of the various buffet formats is that the diners can directly view the food and immediately select which dishes they wish to consume, and usually also can decide how much food they take. Buffets are effective for serving large numbers of people at once, and are often seen in institutional settings, such as business conventions or large parties.
-- Wikipedia
Legal Definition
A meal consisting of several dishes from which guests serve themselves or a room or counter in a station, hotel, or other public building selling light meals or snacks.