Many of the older restaurants do have dress code. Friday lunch at galatoires is so weird and amazing that you imagine it can only be made up. Breakfast at Brennan's may be coming to an end, they lost the iconic pink building on royal (next to latrobe's where Britteny spears was married, it's really trashy inside) and are negotiating rent. The same thing happened to one of my other solid recommendations Charlie's in harahan. If you have access to a car, drive to the other side of the river and go to any of the Veitnamese restaurants over there. One of New Orleans best secrets, huge Veitnamese population on the West Bank and in St. Bernard parish makes some ofthe best Veitnamese food in the us.