One of the best bars in Puerta del Sol is Malaspina, a great place to go for an informal drink and some delicious tapas. The atmosphere is authentic and the food is on point. They also have a good selection of wines, and diners who like red wine should try their Ribera del Duero. The sangria is tasty too, and comes in a jug, perfect for sharing. The value is great for the quality of the food and for the location of the tavern, which is unbeatable.
Calle de Cádiz 9, Madrid, Spain +34 915 23 40 24