The Festival HQ costs 100,000 
and 250,000 
, this building uses food and wood to throw music festivals. These boost your total happiness by 25. The cooldown depends on the amount workers present in the building. It has 5 workers capacity and it takes them 6 days to prepare for a music festival. A music festival also shuts down all your production for 24 hours (people do not go to work for 24 hours). You should prepare food & knowledge beforehand because your all your resources production could drop drastically (these resources get used regardless of player use). This building also the end goal for the Hippie Center.
The price for a festival depends on how many people are present in your world: Running one costs 3 food & 1 wood per person.
Running a festival boosts happiness, which in turn boost production significantly for 7 days (although only can be used for 6, as the music festival runs for 1). This can be used as a replacement for the "boost production" button.
This building is the only way to get happiness above :D. If you throw a music festival when Happiness is at :D, then Happiness will go up to XD.