International audienceBased on the case studies of two working-class and migrant neighbourhoods of Paris, the Bas-Belleville (10th-11th arrondissements) and Château-Rouge (18th), this paper shows the importance of working-class use of street and public space. This use is characterised by many people standing in the street where there is a concentration of cheap shops for immigrants. This concentration creates an urban centrality in which streets are a really sociable place for working-class people of all national origins. In the two neighbourhoods that were studied, this use of public space by immigrants tended to hide the on-going process of gentrification. If this process has been delayed and slowed down in these neighbourhoods compared w...