The only places I see with any significant concentration of bike riders (in the US) are college campuses. And typically, these are beater mountain bikes or old road bikes that have been sitting in their parent's garage for decades. Ideal for getting from class to class or from dorms to campus, almost no money out of pocket if stolen, and over such short distances, maintenance costs are essentially zero.
But post college, bikes are seen as something you grow out of when you can afford a car. There's no infrastructure to support cycling on a mass scale anywhere. You're always fighting an uphill battle if you want to ride a bike as a regular form of transportation.