dress codes for Restaurants in NOLA

I want to visit a few restaurants in NOLA, but I am not sure if I want to dress up. I know I want to make it to Commander's Palace. Would you recommend the brunch? Commander's is is definite a slack/tie place to my knowledge. GW Fins I am sure is a suit place. What are some awesome food places, which you can get in with blue jeans and button down shirt. Thanks.