In front of the dentist’s house, there’s now a blue metal rack with chains and snaps like you can see them in supermarkets for tying shopping carts together.
Turns out that these racks will be used for a quite ambitious scheme of Vienna’s city council: Vienna CityBike. Throw in 2 Euro, untie a bike and ride around.
You’d better be colour-blind though. At least as far as blue and pink are concerned.