What will you be doing? My family is from the West Indies... They basically live in shorts and thong leather sandals. But then dinner dress is also always required, esp for resorts/beach clubs. I personally refuse to wear shorts; I stick to skirts... And prefer to look like a librarian: short sleeved white shirts, trim skirt. But I cave a lot and wear knit short sleeves. Sleeveless shirts are something people will wear, but not tank tops, interestingly enough.