I walked that section of the Mirada Circular four years ago. Things may have changed since then, but here is what I recall offhand:
From El Acebo is a steep descent to Compludo, site of a Roman hydraulic iron works, now a historic site. There was a bar in the little town, but it was closed. The trail passes through two or three villages on the way to Peñalba, and I stopped in one for a very nice lunch and another for a coffee. This was in April, early in the tourist season.
Peñalba itself was rather deserted, but I found a good restaurant and had a fine dinner. I stayed in the attic of a Casa Rural, owned by the somewhat surly people who run the cozy bar near the church. (albergue was closed.)
The church has been restored to within an inch of its life. I recommend a hike up to the cave of St. Ganadio (?) where locals maintain an altar. Really cool. Got to make sure you stock up on eats and drinks in Peñalba as there is only one bar and one town on the way to Las Medulas -- it is a LONG, TOUGH hike, one of the hardest I have done. You arrive at the one bar/one town rather early in the day, and I hope waymarks are more clear now than they were in 2010!
(A real bonus to this hike is a high-altitude labyrinth in a mountain meadow. Spectacular!)
I am sorry I don´t remember the names of those little towns. I deeply love the Valley of Silence, I hope to set a story there one of these novels.