Haven't been myself, but my wife and sister-in-law said this new place is good and cheap. They have card-operated dispensers a la VinoVenue in SF and Taste in Berkeley. Tapas-type snacks, both cold and hot, plus more substantial dishes. Happy hour 4-6 weeknights.
Artisan Wine Lounge & Cafe
1633 Bonanza St, Walnut Creek, CA 94596