When staying at the Coronado Island Marriott, walk along the shore and you will soon come upon a multitude of restaurants and shops. I "discovered" a ferry lwhich residence of the Island use to commute to San Diego - during early morning commute time it is FREE to encourage a more "green" lifestyle. I was staying at the hotel prior to a cruise and the ferry docks in the same area as the cruise ships - convenient and beats a cab ride.
I wanted to add that each room has a jacuzzi bath, separate walk-in shower and plush bathrobes. If you ever get the opportunity to stay in one of the villas, go for it, it is absolutely worth it. This is a very beautiful property.