I will be in Madrid in early August for a meeting at Colegio Oficial de Medicos. We have 1:30 to 3 off for lunch every day (Saturday through Wed) and I'm looking for suggestions for places to eat that are within walking distance of the college and that serve traditional Spanish food. There may be several hundred people at this meeting also trying to get lunch at the same time, so places a bit off the beaten path might be a good idea.