Any recommendations would be appreciated for a luxury resort, with a great beach, a spa and, possibly a casino (doesn't have to be at the resort, but on the island)--and an easy flight from NY -since we'll only have about 4 days.

Where would you go?

Four Seasons in Exumas, Bahamas.

One & Only Ocean Club on Nassau offers 5-star luxury, a very nice beach and a full service spa. Casinos are close by and it's a relatively short flight from NY. If that doesn't appeal to you there are several other resorts in the Bahamas which might fit your needs.

La Samanna on St. Martin is an upscale resort on a beach with a full spa and casino nearby.

There are several resorts on Puerto Rico that have spas and casinos. Check out the El San Juan Hotel. It's on a good beach, has a full service spa, several upscale restaurants and Puerto Rico's largest casino all on the premises. PR is an easy flight from NY.

blamona - is there a casino on Exuma?

The Atlantis, Bahamas.

Also, check out http://www.doitcaribbean.com/
Click on Gambling under "Things To Do"

Four Seasons on Exumas has a small casino!

Thanks, blamona. I didn't see a reference to the casino when I checked their website a while back (when researching a future trip) but after your post I checked again and sure enough it was there.