In Ericeira, there is a wine bar by the name of No Grau°. The meaning is roughly "The Degree" and I don't really know why it has the name. What I do know, is that on most evenings while sipping wine and maybe something to eat, one can listen to Fado, which is a very Portuguese music genre. Difficult to describe, but somewhere along the lines of folk, balad, "longing" lyrics on a slow beat and sung very intensely, mostly in low light conditions. To be a good Fado singer the person requires a very strong voice and is normally accompanied by one standard 6-string guitar and one Portuguese guitarra, which is a plucked string instrument with twelve steel strings, strung in six courses of two strings.
The picture on the left is the guitarra player and on the right is the Fado singer for the evening, taking a break.
I am including an embedded Youtube with a sample of Fado. Chosen, because the lyrics are translated in undertitles, it includes great Portuguese scenery and is not overly long.