wine bar

[lolo6223]

I'll be staying in the union square area, looking for a low key wine bar within walking distance. Any suggestions?

[Robert Lauriston]

Hidden Vine. Barbacco's a combination restaurant and wine bar.

http://www.thehiddenvine.com
http://www.barbaccosf.com

[Rapini]

There's a place called Rouge et Blanc on Grant [btwn Sutter & Bush]. It's physically a nice space, but I've only been there for private events, so can't attest to the choices, or expertise of the staff.

You might do better in the long run at a restaurant with a good wine list. Wines by the glass are readily available at most establishments. Barbacco in the Financial District comes to mind as a place with extensicve wine choices. It's walkable from Union Square, although maybe not as low key as you might want.