Entertainment in the 80s was about rebelling and expressing ideas whereas most entertainment today is about partying. Although they share a lot of common themes with sex drugs and rock and roll.
The same as today, except that the internet was not available! Entertainments of the '80s included live theatre, cinema, radio, video films, TV, recorded music, night clubs and computer...
Our world is very rich in entertainment. You can play video games, read books, watch movies, listen to music, play games (I recommend ping pong), go swimming (if a pool is available), surf the...
Entertainment is anything you can have fun with, including music, games, movies, watching things, parties... and of course there are much more (even before the TV was invented!) ...