Hostal Casa de Barro
(http://www.casadebarro.com.ar), otero 294 esq. belgrano, tel: +54 388 4229578. dorms: 45, matrimonial: 100. [email protected]. small but fairly cute hostel with minimalist/rustic design and only a handful of rooms. central location, no wifi. elderly lady who runs the place is a little forgetful, so best to confirm with the younger staff for bookings/essential items.
Yok Wahi Hostel
La madrid, dorms from ar$50, a bit overpriced and their breakfast is not all that is promised, but all right.