Women should opt for a simple sundress, breezy maxi dress, or high-quality romper. And while dressy sandals are acceptable, avoid standard, beachwear flip-flops. Nice, short-sleeved shirts, such as polos, are permitted for men, as well as nice shorts (think Chinos) with a belt. In general, stick with lighter colors, and absolutely avoid denim, cargo, swim shorts, and cotton T-shirts. This is also the only instance when sandals may be acceptable, but ensure your feet are well-manicured before considering an open-toe look. If not, wear a deck shoe or loafer, never sneakers.