The Festival dao let the user set up a festival or go to one. The Sandstorm dao allowed the user to make a sandstorm shaped attack that did damage over time. The Downtown dao was a commercial block of a city. All the businesses are right beside each other and the only living places are hotels and the personal living spaces usually on the second floor or higher of the buildings.
Police Station dao was the area where all people who committed crimes are taken for processing. If you wanted to save someone from being sent to prison, you would need to stop them from arriving at the police station. Or you would have to do a prison break as most police stations set up a teleport to prisons or have a built in one.