Don't know what "rave" is, in normal night clubs not hitting on anyone all night would be considered creepy. And dances are an essential element helping to ... close the distance. Always were, since middle ages.

The key difference is: do you go there to hook up, or do you go there because you like the place, which as a second order effect is great common ground to meeting someone?

Sure, you don't understand, and that's a sign that the culture doesn't exist in the same way.

Here, this isn't an environment to chat someone up in:

https://youtu.be/T14r2dBJzvc?si=5rkQIJx_zuAtsr-B

Anyone who reads this and knows, will understand... Sandwiches.