In the "truly local libation" category you'll find LA's own San Antonio Winery. Sure, the winery's grapes are now grown up north -- they weren't always, but, over time, downtown encroached upon the just-off-the-5 vineyards -- but the liquid-y magic comes together right here in Los Angeles.
You've been to the downtown tasting room. You've toured the barrel room, and had lunch at the cozy, barrel-ceiling'd restaurant. It's LA, it's wine, it's good.
Swanky, San Antonio. Very.