Atlantis uses a system of private currencies, where each person, family or group "prints" its own currency backed up by their personal capabilities or resources; these currencies are then seamlessly converted by the wearable computer systems. There exist everything from Ingdahlian Rands to Flax Scrip (backed by marijuana) to corporate currencies.
Atlanteans dress as they like, there are few styles that extend outside small groups. Since outdoors life is common, robust clothing and boots are often used, but Atlanteans are known for creative styles. New materials or shapes are popular, and currently nanotech fabrics made of micromachines are all the rage: still very expensive (which of course makes them even more stylish), but with interesting possibilities as they are able to change and reform in delightful ways. Carrying a weapon is usually regarded as either stylish or silly. Wearables are often combined with jewellery.
Atlantean buildings - whether those on the surface or in the huge orbitals, are often movable or modular, easy to move to a new location. Whole cities can be moved if needed (or wanted), and people do tend to move around for a variety of reasons. Zeps, ultralights and other air vehicles are popular since there are relatively few large roads. Cities hence tend to have rather variable populations, and many are more like parking lots around a few static buildings. Sometimes many people arrive, sometimes the city is out of season.