Hi Jen, my experience walking this last February was that the kinds of communal dinners you can find on the Frances are not a feature of this camino. But it was February and it's possible other options will open up as the season get's busier.
FWIW, in my view if the communal meal is something you value (as I do) then you have to work a little harder on this route to put it together yourself. The one truly lovely communal meal we managed was in the albergue in Caminha. Apart from being a nice albergue anyway, it has a full clean modern kitchen and utensils, just like you'd find at home - except more. And a big table in the kitchen that you can get at least ten around. There's a supermarket and other shops about 200m away so it's easy to source your meal's ingredients, plus drinks etc. I guess it was slightly easier in Feb because we had got to know everyone by name who was walking on the path by then. We of course invited the two outliers (from our 'group') in the albergue and I think they very much enjoyed the evening too.
The next evening many of the Caminha crew (who hadn't turned right to walk inland up the Minho) and some others took up residence in the Albergue de Estrela in Viladesuso. Options to cook were thin: a kitchen, but with only a microwave, and a Repsol gas station across the road selling basic provisions.. so we all went to the one bar restaurant open, also on the main road, where they gave us a big table and it ended up being very much like a communal dinner.
We did something similar in Caldas de Reis where the hospitalera told us the best traditional Galician restaurant in town was about to close as the old couple running it were retiring. That was enough information to sell it to all our acquaintances (basically everyone) staying at the albergue and we all ate together around one long table, ages 13-70, which was rather nice.
We managed quite a few other looser arrangements too, so by the end of the journey I felt I'd managed to achieve my full quota of excellent communal meals, even if they often strayed from the standard template... but it does take some planning, canniness and, ideally, recruiting a couple of partners-in-crime to help you organise.. good luck!