Casa de Arena

Casa de Arena is a popular place, especially for young people. It has cheap dorms, singles, and doubles.
There is always hot water. Well, that isn't a problem in the desert.

It has a swimming pool underneath a huge dune, which makes it a fine location. In the large yard, barbeques are held regulary. The bar and the pool attract people from other hostels as well.
The owner speaks excellent English, and can arrange buggie tours which leave at 16:00. He can also arrange tours to Pisco which leaves at 05:30. Shop around before taking any tour.

All in all, this is a fun place.