One city with focus on "Agora Hall" in a retro-futuristic style from the 1950s

one city with focus on "Agora Hall" in a retro-futuristic style from the 1950s, with a sepia-toned color palette. The hall should be filled with people, all dressed in retro-futuristic attire. Some are wearing sleek, mid-century modern clothing with futuristic twists, while others are in uniforms reminiscent of a spacefaring society. A few individuals are clad in ornate, battle-ready armor with a 1950s sci-fi aesthetic. The large, dome-shaped ceiling reflects the warm sepia tones, and the walls feature geometric patterns and futuristic murals. The atmosphere is bustling, capturing the energy and diversity of this imagined society. The overall scene combines vintage futuristic design with a sense of community and readiness for adventure