Resumo. The article produces a reflection on the '100in1Day Cuiabá' event, especially the communication dynamics of urban interventions and social interactions developed in the realization of the festival focused on citizenship. It is argued that the communicational issue, in its urban micropolitical dimension, allows citizen participation that potentiates life to subvert urban planning in the capitalist interest. In this sense, the actions proposed by volunteers allow us to think about the relationship between folkcommunication, political activism and culture, at the same time as collective work is instituted in the memory of individuals as a living force of molecular revolutions to transform the problematic Brazilian cities. By placing the city in a worldwide network of debates on citizenship, the '100em1DiaCuiabá' demands to consider the dynamics of communication in the context of cultural practices in contemporary life in its direct relationship with political practices and the search for a more subjective life.