Cosmo Runway
Premise
The year is 7331, and humanity has spread out into a galaxy populated by diverse alien races, some of its own creation and others uplifted with the arrival of Earth's firstborn. The galaxy is at an unpleasant standstill between various factions vying for prestige, resources and power. Beyond the glimmering towers of the great ecumenopoli and in the dark corners of space yet unexplored, dark things stir.
Thankfully, this has nothing to do with you.
Cosmo
Cosmo Milan is the centerpiece of human civilization in this far-flung region of the Milky Way, a massive world-spanning city built over what was once a lethal swamp world. It mostly exports and imports vice and entertainment in its various forms, and is recognized as the center of fashion in all human civilization. Every era and expression of fashion is represented, from neoclassical smartfiber bodysuits to petrocotton school uniforms or nothing at all with AR overlays. Of no particular strategic importance other than being a major financial player (with no sign of slowing down), Cosmo has gracefully evaded becoming one among thousands of battlefields across the Milky Way.
Living on Cosmo
People on Cosmo Milan live in relative abundance thanks to the mass distribution of fabricator permissions, with the poor often living in small communes in the Undercity and Middlecity, regions, where most services can be obtained. The Overcity wealthy distinguish themselves primarily with vast amounts of open space and majestic architecture. It's a pervasive democracy built on the ideas of self-expression and morphological freedom, featuring all clades of the sapient community showing off through exotic body modifications, AR and their personal style.
Due to widespread fabricators and robotics making most of the workforce obsolete, the Cosmo Milanese maintain an economy based on reputation and barter, obtaining IP permissions for exotics and luxuries by providing services or creating property that other people find desirable. Communities often barter collectively due to limited influence, enforcing internally to maintain bankable reputations. The most famous and powerful of these in Cosmo Milan are the fashion houses and their respective progettista (or designer), due to the unique cultural institution known as the Runway.
The Runway
Combining martial contest, military engineering and art, the Runway is a competition which features massive twenty-foot tall combat machines woven from exotic smart materials known as dresses (also robes or suits for the macho) engaging eachother on rectangular battlefields known as catwalks. A design team consisting of a tailor, DJ and promoter assist the primary operator of the suit, a posthuman warrior known as the model.
Fights are not to the death of the pilot or destruction of his unit, but until all aesthetic elements of the dress also known as features have been vandalized or stripped away. As a consequence, the sport is as much about finesse and elegant design as it is about power and overwhelming aesthetic elements.
The sport is primarily used to gain reputation for a specific fashion household, and advertise their specific styles in order to increase owed favors and buy themselves to better living standards. Despite the intention of being nothing than an advertising plan for fashion houses, the Runway quickly grew to eclipse other media exports (and entertainment on the planet in general) to the degree that nearly everyone is an afficianado and off-world broadcasts often net trillions of credits (which is a lot in pre-scarcity green).