Studies of male sex workers are often confined to the individual level rather than exploring their work environment per se or the larger ecological context in which their business activities are embedded. We know relatively little, for example, about the spatial location of erotic worksites (apart from street-level work) or the interactional dynamics of sellers and clients within such settings. This article presents an ethnographic study of bars and clubs in Prague and Berlin where male sexual commerce is transacted. We find important differences between the cities in the social organization of the bars and in participants’ demographic characteristics. The analysis links our micro-level findings to the larger forces of labour migration and sex tourism, factors that differ between the two cases.