If "There are days when solitude is a heady wine that intoxicates you with freedom, others when it is a bitter tonic, and still others when it is a poison that makes you beat your head against the wall," as Colette writes in Earthly Paradise, then surely Atlantic is the restaurant that suits all three states. When solitude is a heady wine, there is Sheila Lukins's modern American menu to savor by oneself, along with some more literal vino. When solitude's a bitter tonic, there's the view from the outdoor dining area of gently rolling sand dunes and clear, bright azure waters -- of the pool, that is. And when solitude makes you want to bang your head against the wall, well, at least Atlantic's walls were designed by the Ralph Lauren team. It doesn't make 'em any softer on your scalp, but it sure makes 'em pretty.