I will be in Chicago for a conference for 5 days. I've been there once before and enjoyed all the food. I can't remember the name of a single place I went last time, but I did have a memorable meal at a restaurant that specialized in game dishes in the middle of the park. Anyway, my husband and I are both relatively adventurous eaters and would like to try everything from very casual pub food to steakhouse to high-end restaurant. I would love one of the choices to be a seafood place that's casual but with really good fresh fish and possibly an oyster bar. We're staying at the Tremont Hotel right off Michigan Ave, so places not too far away would be appreciated. Thanks in advance.