A number of budget rooms (30) are being arranged for the meeting attendees in a special wing of the Hospedería San Martín Pinario. They are small, basic rooms that used to be part of a University dormitory (see the attached picture; please note that these rooms are not the ones pictured in the Hospederia website).
All have full private bathroom. The price per person (breakfast included) is 23 euro individual room, 20 euro twin room. The location is excellent and you can hardly get anything cheaper than that in the town centre.
For reservations, send an email to reservas@sanmartinpinario.eu indicating your full name and passport number, the check-in and out dates and including the code AARG2015. A credit card number will be requiered as a guarantee. Or you can do so by calling +34-981560282