Free Couscous or Moules Frites
This place has a great, low-key atmosphere any time of the week. It's not a very tourist atmosphere, so almost all of the clients are locals or regulars who come every night and move in: if you don't have a table by ten, chances are, you aren't going to get one.
This is especially true during my favorite time to go: Wednesday or Thursday nights, when the chef cooks up free moules frites or couscous with chicken for all of the customers. All you have to do is buy a drink, and you get free food! It's one of the great secrets of the 10th arrondissement, and part of the reason why this place is always so popular and crowded. [more ]