Opulent Art Nouveau social housing interior, lavish velvet drapes, intricate floral patterns, ornate wooden furnishings, curved lines, sinuous shapes, organic forms, natural materials, earthy tones, soft warm lighting, cozy atmosphere, intimate spaces, communal living areas, decorative metalwork, stained glass windows, mosaic tile floors, plush area rugs, vibrant silk fabrics, luxurious cotton upholstery, whimsical wallpaper designs, flowing curves, biomorphic motifs, eclectic vintage decor.