The ominously named 'golden shower' on Obispo always has live music belting through the doorway, so it's always crowded. But with a higher-than-average jinetero/jinetera (tout)-to-tourist ratio, it might not be the most intimate introduction to Havana. Small snacks are available and the musician's hat comes round every three songs.
La Lluvia de Oro
Habana Vieja