Socio-material conceptualisations of markets suggest that they are spatial formations. Yet, the everyday practical and spatial dimensions of market making have received little explicit attention. We thus introduce the concept of spatio-market practices, drawing on key ideas in market studies and spatial theory. We argue that examining spatio-market practices (and thus the spatial dimensions of markets) promises to provide fresh insight regarding what it takes to realise markets, their uneven distribution, and what and whom markets are (and are not) designed to serve. To demonstrate what the concept calls for, supports and promises, we take Humphreys’ (2010) influential paper as a starting point and draw on other secondary sources in order to articulate an alternative and spatially-oriented account of the growth and legitimacy of the American casino gambling market. This paper, in turn, contributes a subtle and yet incisive shift in thinking, which supports a more explicit means of exploring markets as spatial formations.