Perfect for the single traveller or couple but any more than that and it could be a tight squeeze. There are some great restaurants in the area however just be weary when walking the streets at night time. Nothing to be alarmed about but it can be confronting if you're on your own.
Giannis is a fantastic host and easily contactable. He can offer some great tips on where to eat and places to visit. The Hop On / Hop Off Bus is nearby (5min walk) as well as the Metro. Don't be afraid to get out and explore as there's a lot to offer in Athens.