I have researched this before. There are a few meetings in the Capital but none in central DR associated with AA world Intergroup. That is not to say there could not be many 12 step AA groups out there but I doubt you will find an open speaker meeting in Santiago. They would most likely be smaller word of mouth meetings, discussion and big book meetings.
Hillbilly, If by any chance there is a Big Book to be found in Santiago have him start reading the first 164 pages for that is where the steps are drawn out of. Or if he is still on the edge have him start reading the stories in the back. He just might identify and get a bit of hope. If you can not fin one contact me and I will get him one ( English? or Spanish?). My groups representative here in Boston can get these for me. In the meanwhile, this weekend I will call in town and NYC and see if they can direct me to any Dominicans in the area that travel to and know where the meetings are or the contact number of a service member. Remember to tell him the only requirement for AA is the desire to stop drinking. And when he does know there is a better way of life his drinking will be ruined fore ever.