Hi Anji
We have just returned from Rhodes , and there is lots to do during the day, but becareful with the heat
you might not want to leave the beach or pool.The walk along the harbour is lovely , we went to the Aguarium, walked up to the Acropolis of rhodes, walked along the coastal path into ixia, visited the old town , took a boat over to Symi, also down to lindos, which is cheaper by bus than the boat , but you can get the bus to other resorts Faliraki, Kalithea, there is enough to do depending on what you want .
The Blue Sky is in a great position, for the bars and bar street, but as others have said there is not much in the way of entertainment in the bars .
You will have a great time
Lynne