This thesis project is a multi-sited ethnographic study of music, intimacy, and crowds at "techno" and "house" nightclubs in three cities: Berlin, Paris, and Chicago. It focuses on how music, bodies, and space play a role in engendering a sense of intimacy between strangers on the dancefloor. Working from interviews, sound recordings, and participant observation, it argues that this sense of intimacy emerges out of the shared experience of heightened affect, and that music plays a vital role in shaping this collective experience. The music-analytic engagement with house and techno "tracks" is informed by the aesthetic conventions of Electronic Dance Music, focusing primarily on multi-measure rhythmic patterning, timbre, layered texture, modular structures, and the allusiveness of sampling. In the process, the project intervenes in several theoretical streams; for example, it brings together scholarship on intimacy and on crowds to develop a new concept of group togetherness (i.e., "liquidarity"). It also engages with anthropology, affect theory, philosophy, psychology, and psychoanalysis to trace a line from listening/dancing, through intensified forms of experience, to an expansive sense of belonging.