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Have you booked an accessible room? If so then they are usually twice the size of a normal room and are fully equipped with all the handles, roll in shower etc. Out of Barcelona you will get a high % of Spanish/European cruisers, several Americans and about 25% Brits. Have you checked out your Roll Call for this cruise over on cruise critic where you can 'chat' with your fellow cruisers before you go??? Well worth while.
On the RCI website you can enter your room number and see what it has.