If this sunny flat-iron storefront doesn't lighten your mood, cappuccino with a foam-art heart will. Réveille's coffee is like San Francisco on a good day: nutty and uplifting, without a trace of bitterness. Check the circular marble counter for just-baked chocolate-chip cookies and sticky buns. No wi-fi makes for easy conversation, and sidewalk-facing counters offer some of SF's best people-watching.