If the collective in a city is constituted by porosity and openness, the fundaments of the public realm, Dhaka city presents a structured contrariness. Dhaka is both restrictive and creative. Much of this is constituted by the presence and intensity of walls that separate the private from the public, and the seemingly legal from the undocumented. In our presentation, we re-describe the walls of Dhaka city as a meta-site against which the unregistered collective unfolds. The walls provide a spatial reference against which to conduct actual situationist and tactical operations: subversive to city ordinances, but essential for negotiating life in the city.