As an AI language model, I do not have access to historical data in real-time. Please specify a time period and location for a more precise answer.
However, traditionally restaurants and bars in Spain were built similar to those in other western countries. They were designed with layouts that would cater to different types of patrons, with indoor and outdoor seating areas, separate sections for formal and casual dining, and appropriate décor for the desired ambiance. Materials used ranged from wood and tile to brick and stone. In modern times, contemporary designs, technologies, and green building practices have been incorporated to improve functionality, aesthetics, and energy efficiency.
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