This dissertation examines the history of urban nightlife in New York City and San Francisco from 1890 to 1930 and charts the manifestation of modernity within these cities. While some urbanites tepidly embraced this new modern world, others resisted. Chafing at this seemingly unmoored world, some Americans fretted about one of the most visible effects of modernity on the city—the encroachment of sex onto the street and in commercial amusements—and sought to wield the power of the state to suppress it. Even those Americans who reveled in the new modern world grappled with what this shifting culture ultimately meant for their lives, seeking familiarity where they could find it. Thus, this dissertation details how both Americans who embraced the modern world and those who perceived it as a threatening menace similarly sought a mediated modernity, seeking out and organizing spaces within modern amusements that ultimately reinforced existing cultural hierarchies.

Using the lens of spatial analysis, this dissertation examines how different groups of Americans used the spaces of nighttime amusement to interrogate how nightlife culture reflected and reinforced dynamics of power in a historical moment when social movements seemed to be upending existing power structures of race, class, and gender. Pioneering works in the field of the history of popular amusements tend to frame the experience of commercial amusements—and by extension modern life—as a liberating force lifting Americans from the staid traditions of the nineteenth century. But this dissertation charts the way Americans sought to moderate the effects of modern life, even as they delighted in it. Even as the modern world seemed on the cusp of overturning social hierarchy, Americans found comfort in amusements that structured space to reaffirm the status quo; while so much of the modern world appeared to break with the past, existing structures of social power remained very much the same.