The Den is a small bookable council room within Mount Barker Town Hall at 34–38 Gawler Street. Mount Barker District Council lists a maximum of 25 people and an advertised introductory hire price from $11 per hour, separate from the larger 140-person town hall. The room suits local group discussions, short classes and modest meetings, with its central main-street setting convenient for Mount Barker residents and organisations. Detailed room equipment, catering rules and accessible entrance instructions are not listed in the council summary, so these should be confirmed when reserving The Den rather than borrowed from the larger town hall auditorium.