Calle Paraguay 474Buenos Aires, Argentina C1057AAC Phone: +54 11-7092-1050Fax: +54 11-4313-3024 Hotel E-mailHotel Website Classification 7 Superior First Class Commission Rooms Rates - 170 - Hoteliers! Is your information accurate? Update Here Efe Hotel & Cowork Location & Neighborhood Located near San Martin Square, in the commercial area of the city.