Located in the spacious, open lobby of the Merchant's Laclede building, which also happens to be home to the boutique, luxurious Hilton hotel, 400 Olive offers diners an upscale casual dining experience. This "urban grille" takes advantage of its location by placing diners in an elevated corner of the hotel's atmospheric charm. Lunch options include pastas, burgers and sandwiches, including a grilled crab cake sandwich and a seared tuna sandwich. Dinner entrees feature a filet, a rib eye and a tuna steak, as well as a maple-glazed pork loin and a macadamia nut-crusted salmon. 400 Olive also prepares an Amber Bock onion soup, with gruyère and provolone cheeses, and a cheesecake, savory not sweet, of smoked trout, served with an onion relish. Coffee and various desserts are also available.