Muhidin Maalim Gurumo and Hassan Rehani Bitchuka are two of Tanzania's most well-known singers in the popular music genre known as muziki wa dansi (literally, 'music for dancing'), a variation of the Cuban-based rhumba idiom that has been enormously impactful throughout central, eastern, and western Africa in the contemporary era. This interview-based dual biography investigates the lives and careers of these two men from an ethnomusicological and historical perspective. Gurumo had a career spanning fifty years before his death in 2014. Bitchuka has been singing professionally for forty-five years. The two singers, affectionately called mapacha ("the twins") by their colleagues, worked together as partners for thirty years from 1973-2003. This study situates these exemplary individuals as creative agents in a local cultural context, showcasing interviews, narratives, and nostalgic reminiscences about musical life lived under Colonialism, state Socialism, and current politics in the global neoliberal democratic milieu. The book adds to a growing body of work about popular music in Dar es Salaam and shines a light on these artists' creative processes, the choices they have made regarding rare resources, their styles and efficacy in conflict resolution, and their own memories regarding the musical art they have created.