Susie is trying to decide whether to go to Lisa’s house to watch a movie or go to Sam’s house to play board games . They live about the same distance away, and there is not cost for either event. If she chooses to go to Lisa’s house, what is the opportunity cost?

The opportunity cost of going to Lisa's house to watch a movie would be the enjoyment or experience of playing board games at Sam's house. Essentially, it is the value of the next best alternative foregone or sacrificed, which in this case is the opportunity to play board games at Sam's house.