How to add +1 happiness to some buildings?

[HellBoy33]

Can i add +1 happiness to a building that i want with XML? if yes then how?
Also can make a building give me additional delegates each time it is built like FP does?

 

[planetfall]

Happiness is now called amentity, unlike civ4. Which building do you want to add happiness to? Are you sure you want to, the AI may exploit this idea.