St. Louis — The new Mellow Mushroom pizzeria in Cottleville, Mo., is complete and open, with Knoebel Construction serving as the general contractor. Each Mellow Mushroom restaurant is locally owned and features a completely unique design. This eclectic and colorful 5,400-square-foot location features ‘80s inspired design elements and décor, colorful neon lights, graffiti art and whimsical sculptures. The architect was Oculus Inc.