What hotel are you staying in?
On/near La Ropa Beach-
IL Mare for Italian
Paty's Mar y Mar- good breakfasts on the beach. Lunch is good here as well.
Espuma- nice views. Suggest going around sunset.
The restaurant at La Casa Que Canta has good views at sunset/evening.
The restaurant at Villa Mexicana hotel has good breakfast
El Manglar- you might see a crocodile here
Rossys is a good place for happy hour
Sunset Bar at Catalina Beach Resort for happy hour. Great views.
Kau Kan restaurant just opened at new location at Punta Garrobbo
Arenas for breakfast
Puerto del Sol is a good dinner place. Jorge and staff will take good care of you.
In town- Lety's for excellent coconut shrimp
La Terracita
Coco Bahia
There are so many good places to eat there. It would take me forever to list them all. Post where you are staying and that will help. If you're staying on Madera Beach, my list will be a little different. We usually head down to Zihuatenejo once or twice a year.
If you go to Las Gates beach- Otilia's or Chez Arnoldo are best places. Just see which one has the location on beach you prefer. You can catch a panga boat ride there from the dock in town, get a boat ride over from La Ropa, or walk over the rocky path from La Ropa- wear tennis shoes if doing this.
Zihuatenejo has great fishing if that interests you. Lots of guides available. Also, good chance of seeing whales through end of March. There are dolphin and sunset cruises available. There is a good Mexican market downtown if that is of interest.