The objective of both webinars is to present the work done through psychoanalytic groups for 45 years in what we call critical social situations. To this end, we will present a clinical case in each webinar. Our theoretical references are the works of Freud, Pichon Riviè re and Lacan, articulated in an interdisciplinarity that encompasses philosophy and social sciences in general. We have developed different group devices in the area of social assistance, human rights, education, health in the public sector, in the third sector, in the social movement, in the private sector and in the private practice. The group work with the homeless population brings the opportunity to think about psychoanalysis and groups in contexts radically different from the private practice and opens the door for expanding our therapeutic and social research work. The first webinar will present the case of a therapeutic group developed over two and a half years on the street, with a population that lived on the streets or on the streets. In the second webinar, a survey carried out using different group devices that aimed to get to know in-depth life on the streets of the city will be presented, with a view to the construction of public policy for the homeless population.