Before going out, it may be the time to look for a good place to eat. There are plenty of options to choose. Sitges is a good place to taste the sea food. If you do not like sea food probably is because you have not been to the Mediterranean.
If you want a tip, go to a restaurant you like, and order a portion of sea food "Tapas" with a local white wine --leave the sangria for other less "cultivated" tourists. (Do not know what a "tapa" is? A tapa is a small portion of food served on a dish.)