Visiting Chicago in a few weeks and looking to take a group of 10-15 to dinner. We all love good food - and any type of food. I've been told about Frontera Grille, Charlie Trotter's but would enjoy hearing other recommendations. Will be close to the convention center but willing to venture to other parts of the city. Do not mind paying but would like to steer away from over-hyped/celebrity chef/needlessly expensive restaurants.