Yeah, I think (s)he's referring to the same Hostal Oporto in Madrid. If so, I stayed there one night in October 2000. Great place. My review of it in this forum can be found by using the SEARCH link above/right using MADRID OPORTO as keywords to find it. It's located on a quiet street right behind the Congress building and is about between and 2 blocks from the SOL and BANCO DE ESPAñA metro stops.

Saludos, MadridMan