A standout wine list pairs with Californian-Mediterranean fare at this bistro with a convivial vibe. Heirloom Café is in San Francisco, United States, with californian Restaurant cooking at the center of the experience.

Our model reads Heirloom Café as a narrow but meaningful 1 Star call, not because of one headline metric but because the guide-level and tier-level signals point in the same direction. The model does not see enough guide-level separation for a confident starred call. The question becomes ceiling: the model sees enough strength for a star, but not enough separation to publish a higher-star call. Because this is an upgrade call, the model needs more than general quality; it needs the higher tier to pull away from the alternatives. The separation is real, but not overwhelming, so the call should still be read with some caution. Because the starred signal sits close to a boundary, we mark the prediction as low confidence.