This nice local is located on the street called Ancora, a perpendicular to the Paseo de las Delicias. It has a semi-open terrace on the same street with plenty of space between the tables. The food is very good and not so pricy. The portions are generous even in the so called Menu del dia which at this moment cost 12€.
The service is friendly enough except for one waiter who looks like he is mourning someone.
In short, good food, not expensive, relax atmosphere.
Insider tip ;)