This paper explores the social aspects of a new kind of mobile games where players interact with each other in a shared physical space as well as in-game. As technology spreads throughout layers of culture and everyday life, and gaming becomes increasingly widespread, we see a future in social digital games through the use of smartphones, because of their prevalence and their technical versatility. This poses new challenges for designers. By using the context of music selection in semi-public to public situations and with the help of prototypes, we explore the problems of making selections and connections in large groups as well as delivering feedback. As a result of this project we arrive at elements such as participation, competition, scalability and the importance of social interactions between participants which can be used when designing systems in similar contexts.