This article tries to understand the extent to which initiatives in the cooperative sectors (care and daily help services, fair trade, solidarity finance, social currency etc.) can generate a process of democratisation of economic practices through local public spheres of deliberation and co-operation. The use of the political and philosophical concept of public space to explain certain economic regulation phenomena questions the common representation of the economic and political as two separate social spheres. After presenting different kind of local public spheres, we study the question of whether going beyond the public legitimization of other economic local initiatives than market-exchanged oriented they can act as a new form of econom...