Can I book the Albergue complete for a group?

Yeah. Depending on availability and by Special Modality - Exclusive use of the room.
This way the full room can be reserved for exclusive use, ideal for couples, families or groups of up to 8 people who want more privacy. In this way, the room and the bathroom are of exclusive use to the group, with direct access from the room itself, without transit through other areas of the Albergue. The reserve of this modality is managed exclusively through Airbnb.