Nights on board glitter with choices. Perhaps you'll begin with complimentary espresso and hand-dipped chocolates in the Explorer's Lounge. Or adjourn to the Lido for cognac and hand-rolled cigars under the stars. There's a recently released film to watch in the theater, a blackjack dealer to beat in the casino, dream dancing in romantic lounges. And several evenings, they pull out all the stops with production show spectaculars. Each performance is so impressive, it is sure to bring you to your feet. As will the variety of dance bands that play into the night. On your way to the disco, you make an amazing discovery: The Late Night Snack, tonight's being a sinfully delicious buffet where everything - tortes, cakes, souffles - is made of chocolate. A tough act to follow.