@ggo85For informal, dress the way you would to go out to a nice restaurant for dinner. I wear slacks and tops . I always find the dining rooms cold, so even in hot climates I don't wear anything sleeveless, unless it is accompanied by a wrap, light jacket, or cardigan. So, I would not wear a sundress except for dining on deck in hot climates. Some women wear what what you called work dresses, but personally I prefer slacks and find them more versatile. I take 2 pair of black slacks (just in case), and nice tops that work with them. I also take one casual black dress, plus a necklace, a nice scarf and silk jacket to wear with it and change up the look. My silk jacket also works well with my black pants. Don't overpack. You won't be with the same people every night. And no one will remember or care if you wear the same outfit more than once. Hope this helps.