On one of the early stages of the CF I remember albergue in
Zariquiegui closed couple of years ago. Don't remember a bar or restaurant either.
Approximatelly half way from
Villamayor de Monjardin to Los Arcos there used to be a "hospital" which is now in ruins. It's the only structure on that stretch of 12km if I remember well. A bit uphill some 50-100 meters in the field on the righthand side of the Camino. Maybe that would be for sale? But I haven't seen any electricity line and agua potable might also be a problem.
On the variante from
Azofra to Ciruena (if you want to visit the monastery in
Canas) there is quite a lot of road walking although with almost non-existent traffic and I also don't remember any infrastructure a pilgrim can use.
I doubt
Viloria de la Rioja would be a good spot for your intentions. It already has two albergues (one of them quite famous because P.Coelho was a godfather) and a hotel and maybe even more important is that Belorado with plenty of infrastructure is just 8 km ahead.
There's a stretch between
El Burgo Ranero and Reliegos with nothing, just a long straight senda alongside tarmaced minor road. But there is a village of
Villamarco some 200m to the left a bit after the halfpoint of this leg. As I know Villamarco has nothing yet. Might not be the right location because the villages before and after has plenty of infrastructure although I experienced bed shortage in June 2016 in El Burgo Ranero.
Fresno del Camino and Chozas de Abajo after Leon have bar/restaurant but no places to sleep. Might be worth of taking a peek because a lot of people start walking in Leon and both options would make short day for them after a long journey from home, jetlagged etc.
Again I doubt
Sta.Catalina de Somoza would be good option. On the stretch from Astorga to Foncebadon (25km) there are 17 albergues not to mention hotels and casa rurales.
Fuentesnuevas, 7km after Ponferrada doesn't have albergue.
I think there might be some interesting places in small villages
between Molinaseca and Sarria (on both variants):
https://www.gronze.com/etapa/triacastela/sarria
Well,
from Sarria on you can search for a village without bar and/or albergue with a magnifying glass
Good luck!