The outdoor living room is not a patio with furniture. It is a space conceived with the same rigor as any interior—defined by ceiling, walls, and floor, but with materials that welcome weather rather than resist it. The ceiling might be a vine-covered pergola, a retractable canopy, or the open sky itself. The walls are hedges, lattice screens, or simply the geometry of neighboring buildings. The floor is stone, gravel, or decking, sloped for drainage and scaled for comfort.