Tamarindo does not have a Starbucks, although it has several independent coffee shops and coffee counters. This coffee shop is actually located in a village just outside of town on the main road to and from Tamarindo.
I do not drink coffee, but people who love coffee rave about the coffee in Costa Rica. Coffee is the number two crop, after bananas. My mother-in-law, who goes to Starbucks on most days, said to me that the best coffee she has ever had is the coffee she made at our condo from grounds purchased at the local convenience market.
When we return from Costa Rica to the U.S., we usually will bring back some bags of coffee as gifts for friends. I have heard that people who smuggle drugs into the U.S. will at times use coffee to create an odor that will fool drug sniffing dogs. In fact, I think that there is a scene in the movie Beverly Hills Cop that showed coffee being used by drug smugglers.
I sometimes think that bags of coffee in my suitcase might cause U.S. Customs to think that there are drugs, but I have never had a problem. The Customs agents must be used to people coming back to the U.S. who simply love Costa Rican coffee.