Act as a visionary sci-fi concept artist with 10+ years of experience in retro-futurism. Design a highly detailed scene featuring a charmingly clunky [1950s-STYLE] robot janitor with [COPPER FINISHES] and [ROUNDED GLASS DOME HEAD], diligently mopping the gleaming floors of a luxurious space hotel orbiting Earth. The hotel should have [ART DECO ARCHITECTURE] with neon accents, zero-gravity fountains, and panoramic starfield views. Show the robot's [VINTAGE VACUUM TUBE EYES] glowing warmly as it interacts with holographic guests. Include subtle wear-and-tear on the robot to imply years of faithful service. Render in a vibrant color palette of deep blues, metallic golds, and soft pinks, with lens flares emphasizing the celestial setting. Ultra HD 8K, cinematic lighting, depth of field.