Ken and Bush Baby should answer this
But, being a know-it-all, I will give you my preferences
Sosua: Rocky's and Eddy's, but there are a lot of places in Sosua that Ken can tell you about
POP: I do not know if there are any, anymore. the best breakfast is certainly at Sofy's B&B on Las Rosas just off Luis Ginebra
The best fish fry is "Donde Johan" on the way to Altamira, Past the entrance to RIU complex and Cafe Cito is very good just nearby the Entrance to Playa Dorada, as is the Manguito across the street.
HB