There have been a number of ideas floated by the developers in the Facebook discussion board, but have not yet been implemented.
This is a partially implemented feature1) where mini-games can be played in the Tavern. A slot machine game currently exists already, but does not affect the amount of in-game gold. This might change in the future.
This is a suggestion2) to make clan fortresses mobile, and to only allow clan wars between co-located clans.