Sometimes, towards the end in Galicia, where I hated the state hostels, they were kind of soulless and had a grubby feel without any charm, I shared a hotel room on a couple of occasions with a french pilgrim, it cost about 20 Euro each, rather more expensive than albergues. The private albergues in Galicia are a good option, they are often around 12 Euro each. Regards, Gitti
When it was not possible to get a bed in an albergue, I had shared a room with two ladies I had befriended on the route. Price varies but certainly makes out cheaper than staying in a hotel/hostel on your own.
As there were three of us, we would arrange for an extra bed in the room.
That said, we had stayed in albergues, in the open room, for over 95% of the time.