Guacamole & Margarita's downtown
Two of my favorites. Two blocks and an avenue away from each other.
If one's too crowded, go to the other.
Esperanto has live music at night, so it might not be the best place for a quiet conversation.
Mercadito is quieter, but a bit tighter with seating.
Both places offer amazing food (some authentic, some fusion), and margarita variations up the wazoo.