A little soft reggae doesn't hurt... Wait in Vain, Jammin', No Woman No Cry, things like that. UB40's Red Red Wine (written by Neil Diamond!) is also a big favorite.
Want something more country? Several of Kenny Chesney's recent hits have a definite 'beach' flavor, No Shoes, No Shirt, No Problem, and When the Sun Goes Down are all popular...
And Jerry is right... just about ANY song done to a reggae or calypso beat works.
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An arranger is just a tool. What matters is what you build with it..!