We are from Florida, another hot state, and shorts are acceptable attire year round, day or evening. Is this the case in Vegas? I think the nicest place that we will be eating is probably Delmonico. Will my husband need a sports coat for that, or would dockers and a collared shirt do? Being from a beachy town we're all about casual and comfortable here. We of course will dress for when we see "O", but curious about casual evening dinners and in the casinos in the evenings. Thanks so much.