Athens center has almost no more inhabitants or locals living there. It’s just tourists, bars, shitty street food, so called boutique hotels, and BnBs wherever you look. Most of them are recognizable by the number locks on the main door. Some are private, some are public. I do remember when the center had old locals living there, many years ago. You could rent a flat for fair money. You could even imagine studying or living there. Now it’s just BnB squatters all over the place.