Do: Sign up for a “Pal-entine’s Day” cocktail class at Rhine Hall, complete with welcome cocktails, February 10-12. Drink: Book the private dining room at Z Bar for “Rosé & Roses,” an elegant spread of roses, Dom Perignon, oysters, and caviar for two. Eat: Get your Valentine’s dinner to-go from Aba, where packages come with coconut rice dolmas, beef kebabs, double chocolate cake, and more.