Around the corner from the Gustav Eiffel church and very active plaza. Great place for under $100USD in October, IF you remember to save your PDI receipt given to you at immigration. Otherwise you pay 19% VAT charged non recent visitors and residents. Desk helpful. We found far more to do in and around Arica than we expected. Great breakfast buffet with made to order eggs allowed us to skip or delay lunch. Clean polished wood. Spent 3 nights in the hotel.
Down side: No elevator, though not a problem for us.
Sound from events in the plaza may require earplugs if you retire early, and no one should travel without earplugs.

San beltran is a small hotel ( boutique ? ), but well located
friendly and helpful staff ( however not all speak a foreign language)
rooms are clean, but not all are very spacious.rooms on front side have a balcony,
but one way street is very noisy. Better a room on the backside.
The coffeeshop in the hotel is excellent.

As restaurant nearby we had a good experience in the Barbarella
When in Arica, besides the church and the citadel, the Azapa museum is really
a must - small, but very nice. Prepare some reading before visiting, because all comments are in Spanish ( as french speaker we understand most )

This hotel is supposed to be a Boutique Hotel. It has is pro and its cons:

Pros:
- centrally located about a bolck away from the main plaza and the cathedral
- serves an adequate breakfast and also dinner
- excellent and very helpful staff

Cons:
- no elevator but on the other hand the staff is helpful to carry the luggage up the stairs
- in some rooms the air conditioning unit blows directly into the the bed