I am aware of several in the Caribbean. You can do a web search---you can also search TER boards where there are some discussions of these kinds of resorts. Overall, the reviews do not seem particularly strong from what I've seen. But I admit its still intriguing.

They are run by two different agencies.  I believe the former is located in the DR and the latter while it used to be in Mexico, is currently operating in Columbia.

Also visit the Porn Star board here on TER where a poster very recently described his experiences with each resort.  

Enjoy...

You can also try Affordable Adult Vacations.  Like their name says, their prices are a little below average.  They operate out of Dominican Republic, but their area code (for the office, I'd assume) is in Ontario somewhere.  All in all, it seems pretty legit.

If you go, please write up a cover story for all of us to read.

I went to a resort in the Dominican Republic once a couple years ago before I discovered hobbying. It was cool, but much more expensive than hobbying. A regular stay at that place was four days and three nights for about $4,000. You pay part of that in advance by credit card, and the rest when you get there. You fly there, they pick you up at the airport, drive you to their villa, where you meet the ladies who are available. You can get an idea which ladies are available from the resort's website, which shows their photos. You can even get two ladies if you want, although that costs more. They're always getting new ladies so there's a constant rotation of new faces. There usually are four or five ladies to choose from at a time. You choose a lady and she is your companion during your stay there. She stays with you in your room and does whatever you like: go for walks, go to the beach, hang out by the pool, and so on. All the ladies are young, early to mid 20's and are really cool and friendly. Almost all are Russians and have general English skills. They're all friends with each other and I spent a lot of time hanging out in the villa's communal room with the ladies and the other men who were visiting at the time. There are usually several other men there at the same time. The villa where you stay is like a hotel, with each guest getting his own room, and daily room service. Breakfast, lunch, and dinner are all included in the price. It was all very informal and relaxed, but it's generally for high rollers because of the price, plus airfare. Tipping is not required, but a general tip is 10 percent, which comes out to $400 for the lady, plus optional tips for the house staff and the cook. The men I met there were regulars, businessmen type who kept coming back. At the end of your stay, they drive you to the airport and off you go.

It was a good experience and you're guaranteed to have a good time because the ladies are friendly, but like I said, very expensive. I only went because I didn't know about hobbying at the time. If I knew, I would have taken up hobbying instead of going to the resort. Now that I've discovered hobbying, I much prefer it. Less costly, and less hassle.