Currency is Barbados dollars (usual exchange is 2 BD for 1 USD)- You may pay in USD but usually receive change in BD.
Area directly around the resort is very active and considered safe.
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Restaurants

Car rental optional - bus service good - drive on same side as in UK

Southwinds is on both sides of the road.

Bridgetown very busy traffic - like Manhattan -go once and make a day of it and do not go back.