Pollolandia is a chain of fast food chicken restaurants with good prices (even in tourist towns) and very tasty chicken. In Samara, you will find this on the main road in and out of town. So coming from Nicoya, you are on highway 150, and you keep coming straight (Highway 150 turns West inside Samara) and it will take you to the beach. The Pollolandia is close to where highway 150 turns West, the pollolandia is on your left (East) as you come from Nicoya.
As of Nov 2019, google maps doesn't have the Pollolandia on the map, but it is about 4 or 5 blocks North (closer to Nicoya) from the beach on the East side of the main drag.