This chapter examines the transnational origins of the challenge dance, a distinctly American tradition of brag dancing, and the ways in which Irish and African dance forms converged and collided in the taverns of New York City in the early nineteenth century. Part theater, part sport, challenge dances emerged in the antebellum era alongside boxing. Dance matches were the product of the intersecting diasporas and cultural exchange of Irish and African emigrants moving through the Atlantic world. The chapter first considers the compatibilities in African and Irish dance traditions before discussing the genealogy of challenge dancing. It then looks at challenge dance competitions held on streets and in taverns as part of white and blackface shows. It also describes a cultural space and moment in which working-class blacks and whites saw enough likeness in their dance traditions to frame a space of public, popular competition.