How does an organization organize in public that it neither owns nor controls? If the vast majority of studies on space and organizations focus on private and closed spaces - head offices, open spaces, co-working spaces, third places, liminal spaces, etc. - they under-analyse the question of organizing in public space. I intend to address this question through a study of Non-Profit organizations (NPOs) helping the homeless people in public space. When NPOs set up a solidarity action, they are confronted with excesses, violence and conflicts that can happen quickly. I study these NPO and how, through their practices, they manage to fulfil their mission while trying to preserve the safety of their volunteers and maintain a certain control over the space. This paper analyses the temporality and the strong emotional work involved with solidarity action. It contributes to the literature by demonstrating how socio-material and bodily practices of volunteers produce boundary and mobility, essential to the organizing of the NPOs, and how these practices create organizational spaces in public space. Finally, the discussion explores the roles of boundary work and mobility in organizing in public space.
