Hola! I live with three other (Hidden by Airbnb) . We speak english, espagnol, german, french... you choose!
We live in the Cangrejo, an area very secure where there are a lot of nice restaurants and casinos, 10 min walk for the metro stations Iglesia del Carmen and Via Argentina, and 15min from Casco Viejo en Uber (4 USD maximum°) (where there are all the clubs, restaurants etc.)
In the building, you also have access to the pool, the gym and a sauna ;)