I haven't heard of any dress codes. Some of the nicer restaurants like Emerils ask that men wear sleeves like polo shirts, etc as the sleeveless t-shirts are not acceptable. They all require shoes of some kind but even flip flops are ok.
Thanks, I've never eaten at Tchoup Chop and the two times I've eaten at Emerils were for lunch and almost everyone had on shorts. But that was at lunch and in the hot summertime.