First, I'd rate this bistro 4 1/2 stars, but that's not a T-A option.
Second, go there for the food. The atmosphere is OK, but it's "glorified coffee shop"-style, clean and friendly, but not fancy.
The owners are from Paris, and it rubs off, in a pleasant way, if you like French food. We had both a dinner and a breakfast here, and both were very good, with a Parisian accent.
The French fries and breakfast omelet looked (and tasted) like they were straight out of a Parisian cafe. Thin-cut, fresh french-fries and an omelet with a thin egg layer, and lots of stuffing is expected in Paris, but unusual here. It was delicious! The breakfast pastries (as are all their pastries) are fresh-made on the premises, and taste like it.
For dinner, we had a filet steak, and the salmon. As you might expect in Paris, both were very good, but the biggest emphasis was on the sauces, the vegetables, and the presentation. Good, good, and better, but the hit of the night was the apple tatin, that was the best I've had since - you guessed it - Paris! And, again, like in France, the wine list included some pretty good wines by the glass, half-carafe, or carafe, as well as bottles of local wines and wines from France. Gutsy to serve French wines in Paso Robles, but you do have a choice.
Service was friendly, with the owner helping to pick up the slack by bringing us fresh, hot coffee within seconds of our arrival. The place seemed to be more popular for our late breakfast/early lunch than at dinner, but they did have a great looking breakfast menu. We'll be back - I can't wait to try the "breakfast burrito" (in a French-type bistro ???).