Castelar Hotel & Spavs?

"The 1929 Hotel Castelar was a stopping point for Spanish literary stars during the golden years of the 1930s." Full review

"The high-ceilinged lobby is grand but the furniture’s a bit worn, and while the standard rooms are just good enough the superiors are more what you’d expect for a fancy hotel." Full review

"A classic in the city’s political hub, the Castelar is a good-value, traditional, mid-range hotel with lovely views of the bustling Avenida de Mayo from many of its rooms."

"This pleasant, old-fashioned hotel, where Spanish poet Federico García Lorca stayed when he was in town, offers attractive and soundproof, if slightly over-priced, rooms with big comfortable beds."

"There's an elegant cocktail bar adjacent to the old-school lobby, conference facilities and, in the basement, a Turkish spa with steam rooms, a sauna and massage facilities." Full review