The potentiality of crowds, in terms of possibilities for achieving a livelihood in the big and dense cities, gains centre stage in contemporary urban studies dealing with the global South. These emergent effects of crowds act as dissociation of further work in urban theory from the global North that often displays a universalistic claim. However, contemporary urban theory both from the global South and North has astonishing less to say about internal processes of crowds that could be interpreted as emerging effects. The paper analyses the work on crowds by Peter Sloterdijk and the performative theory of assembly by Judith Butler in terms of theoretical possibilities to enrich contemporary thinking on urbanity in the South. The paper accentuates two important arguments for urban theory that could be fit into existing work in the field. Sloterdijk emphasises the "affective synthesis" of crowds and the build environment as an important mechanism of interaction between crowds and urbanity, whereas Butler elaborates the performative effect of crowds to articulate the right of owning attested rights.