Answer:
1. Los restaurantes de tapas.
2. una tradición gastronómica típica.
3. populares.
4. parte de la rutina.
5. pequeñas porciones.
6. En los restaurantes de montaditos.
7. Al pagar.
Explanation: Just to elaborate a little on the answer, it can be added that this text is talking about the Spanish tradition of tapas, so, in option 1, "tiendas de moda" should be discarded, since those are shops where you buy clothes. Option 2 describes tapas as a typical gastronomical tradition, and option 3 adds that they are popular meeting places—far from exclusive places or places that are only visited by a few people. Option 4 reveals that this tradition of going out for tapas is part of their routine, not bad for the health, and option 5 describes them as small portions of food. In option 6 they mention that in restaurants that sell small sandwiches called "montaditos" waiters do not serve the food to the customers. Finally, option 7 reveals that, when it comes to pay in those restaurants, one must show his or her dish to the cashier, who will in return say how much is the bill.