Duck into sunny and sophisticated Ammos, right across from Grand Central Terminal, and leave gray skies behind. Favoring a certain modern Mediterranean-meets-Manhattan elegance, this upscale Greek brightens the midtown lunch crowds with white market umbrellas hanging from the ceiling, warm yet efficient service, and a well-run kitchen serving time-honored favorites with contemporary flair. The fresh and modern boosts are clear in spanikopita, prepared with tangy feta and spinach between two crisp, golden layers of phyllo, jazzed up with light tomato sauce and mint olive oil. Salads, the Ammos fries, and a three-course prix-fixe are most popular at lunch, while quieter dinners feature a large selection of entrées and fresh fish by-the-pound.