Here’s a few posts I was able to find discussing free (idle) time and entertainment.
Most of the discussions so far have been more oriented towards small actions/activities the hearthlings might do when they don’t have any jobs at the moment. There’s a few though that could lead to larger concepts of entertainment–one of my own Suggestion threads was focused around the idea of museums, which would result in passive activity for your citizens, a new depth to Net Worth, and the potential of theft (offering more use for Footmen in your city and deeper gameplay). Here’s the link for that one…
Flaunt your Wealth and History! The Curator
Hope a few of these help!