Time Out says
Oliveros is the genuine article, and although it was closed for years, it has been miraculously preserved in its original mid 19th-century bare-bricked state, complete with tiles and zinc bar. Opening hours can be somewhat erratic, however.
San Millán, 4
|Transport:||La Latina (M: L5)|
|Opening hours:||Tue-Sat 1pm-5pm and 8pm-12.30am; Sun noon-6pm|