San Francisco is so close to Napa so people often want to come and try local wines when they hit wine bars in the city. Sadly the selection of local wines is rarely that impressive unless you can have them next to what you might be more familiar with. Hotel Biron, hidden down an alleyway with it's cozy dark lighting, brick wall and underground feel, brings you not only that romantic atmosphere you're looking for in a wine bar, but also has an excellent worldly, very well curated selection. You'll likely be served at the bar by the owner himself too which is always a plus in a place like this.