I wear comfortable clothes usually cotton pants, jersey top,and sneakers. Definatley pack a change of clothes for dinner in your carry-on luggage. I usually pack either a sundress or a pair of chinos or dockers type pants, jersey and flat sandals. I also pack my bathing suit and a pair of shorts.
Most of the time you luggage will arrive before dinner, but its a good idea to have a change of clothes just in case.