The idea of mass entertainment most certainly has been around since the gladiators fought in front of thousands of people as a form of leisure for rich and poor alike.  America seems to have perfected the ideal with the traveling circus and now we have concerts, football, basketball, and events all over the country which entertain and fulfill the need for leisure by all levels of society. 

Mass entertainment generally means a form of enjoyment, leisure and entertainment that appeals to a majority of people no matter what the social background.  We have so many types of mass entertainment in todays society that I have no doubt even Huxley would be overwhelmed at his accuracy when he wrote "A Brave New World."