Plenty of discos in Zona Colonial, as it is a nighlife area. Get on foursquare.com and check them out. Dominican Fiesta hotel is very far fron Zona Colonial. On the opposie side of the city, so to speak. It's in the middle of a residential area, so there are bars and restaurants, but I don't know of any disco around there. Maybe Jet Set and Guacara Taina are the closest ones, both within a 10 min drive.