I have never been up there, as I generally do not go to bars. There are several night clubs, including places with live music, in Tamarindo.
I once drove by this night club at night and I saw two young women, who looked to be tourists, who were on the street either going in or going out. The were wearing high heels and little black dresses. They looked like they were ready to go "clubbing" in New York or L.A. They must have read in a guidebook before coming that Tamarindo has some night spots. Their dresses and shoes looked out of place in a little resort town where most of the streets are not yet paved. Tamarindo is nothing like Cancun (except we have a better beach).
Jarart of Prescott (Arizona) Area Daily Photo correctly guessed in her comment yesterday that the photo showed a video screen in a night club. Since she lives in Prescott, famous for its old West "Whiskey Row" of saloons, I guess she knows something about night spots.
We are featuring photos of Iceland this week on our Viva la Voyage travel photo site.