If you want a relaxing time with options for activities- Punta Leona is the one. It is close (1 hour drive) to San Jose- the capital and to Jaco. It is probably the closest beach to the capital.
Visited by Costa Ricans and people from around the world. It is family oriented. Very clean rooms and linens. Workers are extremely friendly. And the manger is very much customer oriented and friendly. They have three restaurants around the resort. Food is amazing in its quality and variations. I plan to stay there again on my next trip to this paradise.