As of the start of this year, the Clarion Hotel is the Plaza Naco Hotel.
Dominican Republic Travel News - January 24, 2012
Hotel Plaza Naco
The Clarion Santo Domingo has reverted to its former name of Hotel Plaza Naco. The city hotel first opened in 1988 is located midtown, next door to the Plaza Naco shopping mall in the Naco residential area. The hotel, which is operated by Hotelera Naco, caters primarily for business travelers.
I tend to disagree with everybody that posted here. The best hotel in Santo Domingo by far is Hotel Jaragua. All the famous artists, baseball players and others have stayed there and it also has the best casino and concert hall in the whole Santo Domingo area.