When the sun goes down and the traditional nine-to-five workforce retreats to the suburbs, a massive, hidden economic engine roars to life. From 6 PM to 6 AM, the modern metropolis undergoes a radical transformation. Delivery fleets reorganize global supply chains, industrial cleaners sanitize towering skyscrapers, and a multi-billion-dollar hospitality and entertainment industry takes center stage. Yet, despite generating up to a third of a major city's revenue, the night-time economy has historically been ignored, heavily policed, or viewed entirely as a nuisance by urban planners. This eye-opening economic analysis sheds light on the vibrant, complex ecosystem of the 24-hour city. The author dives into the emerging role of "Night Mayors" in cities like Amsterdam and London, detailing how forward-thinking municipalities are finally treating the night as an economic asset rather than a liability. You will explore the intricate logistics that keep cities breathing while we sleep, the sociological importance of nightlife as a crucible for cultural innovation, and the harsh realities of the invisible shift workers who make it all possible. Whether you are an urban planner, an entrepreneur, or a fascinated city dweller, this book will completely change the way you view the urban landscape. Discover the immense financial power, the logistical miracles, and the delicate political balance required to govern a city that never actually sleeps.