Like the rest of North Beach, Enrico's is overrun every weekend with what one might call a bridge, tunnel, and airport crowd. But on Mondays, empty tables, a streetside patio, good drinks (try the mojito), well-paced service, and a nice selection of tapas and entrees make this a singularly pleasurable destination. Urban in a quiet, tranquil sort of way. Classy, yet unpretentious. Casual, but refined. The kind of ambience that makes you sit back and think: "This is why I live in San Francisco."