Greece September 2023 Advice

In Paros I assume you mean Yades Suite (in Naoussa)
I don't know this hotel, but I know Paros quite well. Naoussa is not my favorite place.
The hotel is located a little outside the touristy area near the port with its restaurants, bars and luxury shops.
Which is pretty good in my opinion. (more quiet)
Piperi beach is not far away. The beaches of Naoussa are not the best in Paros (and facing the north wind) but at least you won't have to go far to go swimming.
If you like sweets and good bread, near the hotel there is an excellent pastry-bakery "Chamēlothōrēs" here:

https://goo.gl/maps/YZBsKFgioJArKJBLA

Paros has a good bus service but a rental car is still preferable if you want to visit the island without the constraints of bus times and destinations.

In Athens, the Attalos hotel is relatively well located, a few minutes walk from the Acropolis, the Agora, etc.

You will also be very close to the Municipal Market which should not be missed. It's in the same street as your hotel, 150 meters further north (go there in the morning). If you want to eat real Greek cuisine you can have lunch there. There are small taverns serving dishes made with fresh produce from the market.

"Oinomageireio Epirus"

https://goo.gl/maps/V88KyMa1TKUNauRF9

and "Aris Tavern"

https://goo.gl/maps/qMM88W3VkCEi5bx86

Not far from your hotel is the restaurant (for meat lovers)

Karamanlidika

https://goo.gl/maps/gT353YvxxvovS5bj8

https://karamanlidika.gr/en/

There are few tables and it is advisable to book.

Sorry, I never stay in hotels in Greece, on the other hand as you can see, I go to restaurants a lot... :))

All of this is great. Hotel Attalos is a great choice, it's the best time of year, you're leaving from Athens. Paros-to-Athens ferry hopefully goes well.

Four nights in Athens is a lot, though, of course, with a city that size there is plenty to do. If you like, you could possibly arrange to rent a car and fit in a quick side-trip to Nafplio or Delphi. I always try to end my Greece trips by returning my rental car to the airport because the office is directly outside the terminal.