Entertaiment is any activity or form of amusement or recreation. It may be as simple as watching a film, a television show, or playing a video game; it can involve any number of people from a couple to a crowd or even a global audience. Entertainment can be serious or satirical, ceremonial or raucous. It can be an expression of individuality or an endorsement of the status quo.
Entertaiment stimulates the brain to realease seratonin and dopamine wich gives a good feeling because it hits on points our minds were evolved to deeply react in, in order to understand the social world we live in. Dan had a lot of stereo entertainment equipment in his room. It kept him occupied during his long layovers.