Parrillas are casual restaurants specializing in grilled meats, usually served with chimichurri sauce and fresh salads. Joe could try one of these. Also, he could go to the Cantinas with traditional dishes.
What are the recommendations?
Joe could try Pulperías which are historic country stores that have been converted into restaurants, often offering regional specialties like asado with local cuts of meat and homemade desserts.
Depending on where Joe is visiting, he might want to try specific regional dishes like humitas like corn tamales in the north, chivito or goat meat in Patagonia, or cordero patagónico also known as Patagonian lamb in the south.