Post-Valentine’s Day chocolates and sweets sales are hard to resist. Equally irresistible is South Beach’s new ice cream and dessert shop, New York’s famed Serendipity 3. While the frozen hot chocolate has earned raves (and movie cameos), don’t miss the shop’s whimsical cocktails, which can be as indulgent as a dessert or virtually guilt-free. Calorie-counting diners might try the Size 0 cocktail made with vodka, muddled strawberry and cucumber, and light lemonade. And for something sweeter, there’s the Caketini, which is topped with actual cake.