In addition to the Santo Domingo mainstream community at Centro Israelita (809 535 6042) on Sarasota 21 between Lincoln and Churchill right before the shops in Plaza Universitaria, there is a new Chabad House a little further west on Sarasota, in Calle El Recodo #5 8A (809-533-8770) which is a small street off Sarasota between the bomba Texaco and the Hotel El Embajador.
I think there are still services in Sosua one Friday per month.
At Centro Israelita there are services at 0715 on Thursday mornings and at 1930 Friday evenings. They have a program of cultural activities a couple of evenings a week. The Religious Director (he is not a rabbi) is recovering from a stroke.