The ritzy 52nd-floor lounge atop Boston’s soaring Prudential Tower is a gorgeous setting for romance, especially if you arrive late in the afternoon and watch the sunset. Evenings after 7:30, the lounge features jazz ensembles—just the atmosphere for a fancy cocktail, if that’s your style. Food options include charcuterie, calamari, burgers, and seafood platters. Dress is business casual (in the adjacent formal dining room, jackets and dress pants are recommended for men).