Olympus.

Olympus holds the bulk of most corporations head quarters and a corperation isn't considered mega until it has set up it's branch in the cloudy skies of Venus, and even then it has not made it to the upper echelon until it opens it's doors in the planets capital, the city of Olympus.
Unlike the traditional and magical ties that Earth keeps with their spirits and the quasi religious nature everyone on mars has with tech or machines.
Venus keeps it in balance because they sell to everyone it has become such a powerful force in the system that Venus using their combined funds and interest was able to buy private fleets and armies. Which eventually made itself a psudo governmental power under the name the Mercantile Collective of Worlds.
Those fleets and armies are only to protect their assets however the Mercantile collective of worlds allows itself to be ordered by the Unions rules.
Olympus is not a place for those lacking status, looks, fame, or money. On Olympus it is a place of constant financial competition where your very neighbor is most certainly looking to find anything that would advance their own status or wealth. There are stories of employees of worker and CEO alike who had everything stolen from them or a bad deal made, making them bankrupt.
Though lucky for them Olympus has given them tubes to allow for safe passage to a temporary living space on the planets surface.

Industry & Trade

The Capital of Venus, the cloud city Olympus acquired it's namesake for the number of big corporations HQ's stationed there.
Automatoys

Gazers
Interstellar Press
Starships for cheap
Jason Cryogenics
Principal Technology
to name a few.

Type

Metropolis

Population

5 Million

Owning Organization

Mercantile Collective of Worlds

Characters in Location

• Yin Dragonbreath