Super,
I am not a great fan of Athens, aleast not for a week, maybe a day or two at the most. If you are in Rhodes, the other greek islands, should be a must see if you can stay at other hotel brands. Santorini, Mykonos are the most popular. Mykonos is a blast, lots to do. You can get around the islands be Ferry (cheap). I like Rhodes, but I love Mykonos.