Interzone Streets
A section of the Strip, a megapolis within a 3.8 million km diameter orbital ring habitat
The most famous area of Circus is a free city--actually a megapolis or ecumenopolis--without a single name. It's most often called Interzone, though it's vast spaceport-adjacent tourist area is known as the Strip. Interzone's boundaries are vague, but including all of it's favelas and industrial parks, it covers an an area only a little less than the surface area of Sol IV (Mars).
Spacers say there is no law in Interzone, but this is not strictly true. Rather it's a demarchy with minimalist government. The Wise Minds (a group of ancient infosophonts) select via lottery the anonymous rulers of the city--the Tsadikim--from among the populous. A Tsadik may serve for a few days or for a lifetime, based on the real-time evaluation of the Wise Minds. Every Tsadik (with the advice of the Minds) can create new laws at whim, though these must be approved by a majority of the other Tsadikim. Likewise, any Tsadik can supercede the decree of another with the same procedure. Tsadik can settle disputes among the populace themselves or a trial with a judge (this decision too is subject to review by the others).
The only immutable laws of Interzone are "property and self are sacred", "self-defense and common defense are a justification for violence", and "a contract is a contract."