Yield's pretty quiet even when full except on quiz night.
Terror's usually quiet but it gets busy randomly and then it's not.
Blanc et Rouge in Embarcadero Center is usually quiet after the after-work rush.
Heaven's Dog has a short but good wine list.
The Yield spinoff Pause in the old Cav space has been quiet every time I've been in there.
Hotel Biron (not a hotel, just a wine bar) is usually quiet.
45 Rose St, San Francisco, CA 94102
Terroir Natural Wine Merchant & Bar
1116 Folsom Street, San Francisco, CA 94103
Yield Wine Bar
2490 3rd St, San Francisco, CA 94107
1148 Mission Street, San Francisco, CA 94103
Blanc et Rouge
2 Embarcadero Center, San Francisco, CA 94111
Pause Wine Bar
1666 Market St, San Francisco, CA 94102