Recent work has pointed to the importance for their social inclusion of convivial encounters between people with and without disabilities, but little is known about the spatial and social conditions of the places that encourage these encounters. This paper is concerned with public places that are conducive for convivial encounters between people with and without disabilities. Drawing on extensive participative observations of four community projects and 78 interviews with people visiting or working at these projects we investigated which elements in these places encourage ‘strangers’ to move from merely co-presence to conviviality. Three conditions seem to be conducive, namely: (1) a shared purpose, (2) built-in boundaries, (3) freedom to (dis)engage. These conditions were beneficial for convivial encounters, but do not lead to friendship or long-term support. People engage in such contact because they can be sure that these contacts do not raise expectations of long-term support or friendship.