La Madame is one of the most forward-facing dining spots in San Sebastián. It's one of the only place in the city where you can find well-executed fusion cuisine, with touches of American, Japanese, French and Basque cuisine and perhaps THE only that has a real cocktail program in place. It's a dark, vibey spot. Call ahead for reservations and go hungry.
Mondays are special menu days, each with a different theme.