The area around Place de la Concorde can be somewhat daunting for finding a good place to dine if you are not familiar with Paris
Les Arlots is a tiny, cosy and extremely intimate bistro up at Barbès Rochechouart, reservation is a must, especially if more than two of you will be eating.
When we visited Sagarra, a traditional and large restaurant not far off Barcelona La Rambla, it had plenty of diners but also plenty of empty spaces.
A coldish evening in Barcelona was perhaps not the best time to try ATN, a restaurant just off La Rambla. It was mostly empty and lacked atmosphere.
With only a handful or so of tables, Chez Germaine really packs in the charm, offering autumnal comfort food in what has to be one of the smallest bistros in Paris.