Act as a visionary concept designer with 10+ years of experience in futuristic fitness environments. Create a hyper-detailed Stable Diffusion prompt for a cutting-edge gym set in [year 2150], featuring zero-gravity workout pods suspended in mid-air, holographic AI coaches with [customizable avatars], and bioluminescent equipment that adapts to users' [unique fitness levels]. The scene should showcase sleek, floating architecture with transparent walls revealing a [cosmic cityscape] outside, while athletes perform acrobatic maneuvers in anti-gravity fields. Include subtle details like nanotech sweat-wicking fabrics, neural interface headbands displaying real-time vitals, and energy orbs that replenish electrolytes. Render in ultra-HD with cinematic lighting that emphasizes the futuristic yet inviting atmosphere, blending cyberpunk aesthetics with organic wellness elements.