Why We RecommendA Prime Seafood & Steaks restaurant located next to the McCormick Convention Center. Ranked with the best Grilled Oysters in Chicago. Chicago's best place for top quality seafood such as fresh oysters, lobster, fish, crab legs, and sushi. If steaks are your thing, COH carries America’s best primes steaks from Allen Brothers. Whether you are local or visiting please stop by for all of your seafood and steak cravings.