In the Hungarian folk revival, Hungarian Roma (Gypsies) serve as both privileged informants and exotic Others. The musicians of the revival known as the táncház (dance-house) movement rely heavily on rural Rom musicians, especially those from Transylvania, as authentic sources of traditional Hungarian repertoire and style. Táncház rhetoric centres on the trope of localized authenticity; but the authority wielded by rural Rom musicians, who carry music both between villages and around the world, complicates the fixed boundaries that various powerful stakeholders would place on the tradition. Drawing on media sources and on fieldwork in Hungary and Romania, I examine how authenticity and ‘Gypsiness’ are presented and controlled by the scholars, musicians, and administrators who lead the táncház movement, in particular in the context of camps and workshops dedicated to Hungarian folk music and dance. Organizers often erect clear boundaries of status, genre, and gender roles through such events, which, among other things, address the anxiety raised by Rom musicians’ power in liminal spaces. In addition, I look at how Rom musicians both negotiate with the táncház’s aesthetic of authenticity and challenge it musically. Finally, I discuss how musicians and the crowds that gather to hear and dance to their music together create a carnival atmosphere, breaking down some of the boundaries that organizers work so hard to create. Throughout, I demonstrate that liminality is an extraordinarily pertinent lens through which to view Roma participation in the Hungarian folk music scene.