Résumé : Located between the "gay" neighbourhood and the "working-class" Anneessens neighbourhood, Place Fontainas has been the site of several presumed homophobic acts of violence, thus contributing to its categorisation as a dangerous area, particularly for homosexual populations. In response to this type of violence, there have been several measures adopted by the public authorities, yet they are in keeping with an often binary and essentialising logic of security. Based on direct observation work and interviews at and around Place Fontainas, the present article intends to adopt a new approach. It examines this area based on the notion of border and, through an intersectional analysis, discusses the social and urban mechanisms which contribute to the establishment of abrupt changes in terms of sexuality, social class and ethnicity. However, in each of the areas studied, there is a continuity of male domination, which makes women invisible and limits their access to public space.