Abstract. Our everyday lives are characterised by encounters, some are fleeting and ephemeral and others are more enduring and meaningful exchanges. Shared encounters are the glue of social networks and have a socializing effect in terms of mutual understanding, empathy, respect and thus tolerance towards others. The quality and characteristics of such encounters are affected by the setting, or situation in which they occur. In a world shaped by communication technologies, non-place-based networks often coexist alongside to the traditional local face-to-face social networks. As these multiple and distinct on and off-line communities tend to carry out their activities in more and more distinct and sophisticated spaces, a lack of coherency and fragmentation emerges in the sense of a shared space of community. Open public space with its streets, parks and squares plays an important role in providing space for shared encounters among and between these coexisting networks. Mobile and ubiquitous technologies enable social encounters located in public space, albeit not confined to fixed settings, whilst also offering sharing of experiences from non-place based networks. We will look at how to create or support the conditions for meaningful and persisting shared encounters. In particular we propose to explore how technologies can be appropriated for shared interactions that can occur spontaneously and playfully and in doing so re-inhabit and connect place-based social networks.