A free party is a party "free" from the restrictions of the legal club scene, similar to the free festival movement. It typically involves a sound system playing electronic dance music from late at night until the time when the organisers decide to go home. A free party can be composed of just one system or of many and if the party becomes a festival, it becomes a teknival. The parties can be thought of as autonomous zones where all the people present create and enforce the rules. This means that drugs are readily available and noise levels are usually illegally high. The word free in this context is used both to describe the entry fee and the lack of restrictions and law enforcement. Motivations for organisers range from political protest to just wanting to have fun. An example of free parties as political protest was their prominence during the M11 link road protest. At most parties no money is asked for entrance since the aim is not to make profit. However at some (most often indoor) events it is requested at the door to make a donation to cover costs.