You just walk in and the bass takes over and propels you. There is much more diversity in behavior. Ravers show off in different ways, through the brand image they create in what they wear, the energy they put into dancing, the enjoyment they have. The nearest thing to a compere is the DJ, who typically does not say anything much. There are no governing bodies, just underground networks of informal contacts and groups of like-minded, fun loving individuals who just want to dance.
Ravers still have to take into account the effect of their dancing on others.
There is more physical contact between ravers because people dance in different ways and directions. But if you end up spending more time avoiding people than dancing to the beat then you can always go off and find some more space. In the unorganized world, raving is both therapy and exercise. You work on your body and close off your mind.