Establishing a Silent Disco system

Who hasn't experienced this? You're at or organising an event and you're constantly faced with the challenge of adjusting the noise level to meet the expectations of the guests on the one hand and the noise protection requirements of the surrounding area/neighbourhood on the other. Everyone has probably already realised that this often leads to conflicts.
We would therefore like to purchase a so-called "silent disco" system. This involves a certain number (from 5 to 500 or more) of wireless headphones, all of which are played with music via one or more powerful transmitters. Some systems even offer several channels so that you can even switch between music genres depending on the event.
In this way, each guest can adjust the volume to a level that is comfortable for him or her, but the people around them will not notice. Of course, the system works best with electronic music, but theoretically it would also be possible to broadcast an entire band with electric drums etc. almost silently. Only the vocals would be heard.

We were recently able to convince ourselves of such a system in the UK and would like to establish it in Baiersdorf. Like almost all of our equipment, this system should also benefit as many (Baiersdorf) institutions as possible and open up new possibilities for events.