By the admission of the concierge or maître d’ of almost any 5-star hotel the standard of apparel is now virtually unrestricted. We’ve seen a couple in the main dining room of the Carlyle in matching designer sweat pants and top (and another – Robert Downey, Jr. in fact – wearing a baseball cap at table); people in blue jeans in the main dining room of the Jekyll Island Club; shorts everywhere at the Plaza including the Palm Court. The truth is, if the hotels want the business, they’ll take what they get. Besides I know of no one who travels with black tie. By design the intention of travellers is to wear strictly what is comfortable and easy to launder on the run. Similarly if a place imposes a dress code it is more likely to be avoided (though possibly the deference persists on upscale charter cruises which cater to an older crowd).