'All-Paris') is a French expression referring to the stylish and affluent elite of Paris, who frequent fashionable events and places, and establish trends in upper-class culture.
[3] A group made up of writers, politicians, bankers and prominent artists, this community lived in fashionable neighbourhoods, went to the theatre, and attended receptions at embassies.
It also embodied a certain idea of Parisians' "good taste" (bon goût), setting trends with its pastimes, such as horse racing and holidays at the seaside.
Upon its creation in 1903, the Bottin mondain (fr) directory of high society in fact presented only a list of Parisian personalities.
Le Tout-Paris was associated with particular fashionable places in the city, such as the restaurant (Maxim's, the large urban forest the Bois de Boulogne, Deauville, and so on, defining trends, giving an artist or writer their blessing, making or unmaking the reputation of a politician.