Assuming that you can speak Spanish reasonably well, you might find a nice Dominican girlfriend practically anywhere. There is no shortage of attractive young Dominican women who would like a non Dominican boyfriend.
One of the catches is that many have children or babies, but when you find girls who have avoided giving birth, they may well be more intelligent and more ambitious, and those are probably the ones to focus on. Usually, of course, they will be looking for an opportunity to advance materially, so if you are well off, single, and have a nice home and no kids, that is a huge plus in their eyes.
My novia has many friends who are interested in meeting a novio. These are nice girls who are not putas, some of them are college students, but all of them are poor.