For quieter surroundings and excellent, more trad tapas, I suggest Zarzuela up on Russian Hill. 661 Howard St., above Hawthorne. Cocktails, beer and wine. Park on streets or in garage on Third. The restaurant is a theatrically themed space with sketch-portraits of famous thespians and some costume design works.
Some nights there is a live pianist.
All in all, a very civilized place with good food inspired by healthy French cooking. Armand, at the bar, will charm you and deliver some of the friendliest service in the city. There's a bar menu. Breakfast, dinner, late dining 7 days. Cocktails, beer and wine.