The old quarter of the city is packed with pintxo restaurants. As you stroll through the small cobbled streets, you can see them all set up on the bar, enticing you to come in and take your pick. You order drinks, and pintxo as you go and when you're ready to leave, you tell the bartender what you had and pay. They remember every time, even if you forget!
Try everything, despite not knowing what it is. Sometimes the best ones, are the ones you least suspect.