I've done a couple of gigs where they've done just that, but with multiple DJ's -- the listener/dancers picked the channel with the groove they preferred. It was not multiple genres though -- to a viewer, everyone appeared to be moving to the same beat, more or less...you know, like white folks tend to do.

It's a weird-looking thing, though, IMHO... a big bunch of people bobbing and bouncing but no audible music.
And then there's this, the neurophone:
https://www.amazon.com/Neurophone-NF3-By-Patrick-Flanagan/dp/B008GOKGXI I looked at this guy's patent about 45 years ago, when we were desperately trying to find ways to make monitor systems work better. The patent claims the device bypasses the mechanical parts of the auditory chain and directly stimulates the auditory nervous system. It appeared to me to be a relatively low-frequency (50KHz) RF transmitter, the antenna of which the user was supposed to place in close proximity his nervous system, either along the spinal cord or against the skull.

I had forgotten all about it until I started to write this post, then I decided to see what an Internet search would turn up. So... the guy, Patrick Flanagan is still in a business of sorts -- if you search his brand on Amazon, you'll find he is literally in the snake-oil, er... I mean, dietary supplement business -- apparently the neurophone hasn't paid off sufficiently.

Back in the 70's, when I originally researched this, he also had a couple of popular books about pyramid power, so you might understand my original and continuing skepticism.
Update: Further research reveals Flanagan died in 2019, but it appears his various grifts, er, uh... New Age enterprises live on. His Wiki entry claims he invented the neurophone in 1958, when he was 13 years old.
Further update: He also offers a pendant that protects you from "EMF", for which the claim is that it is "The ONLY Pendant You Will Ever Need for Complete Body Protection from WiFi/Smart Meters/Computers/Cell Towers + Much More". You can order one today from Amazon for only $599, plus $29 shipping. (for a pendant that is 1-3/4" in diameter and weighs just over 1 oz. -- it could be mailed for the cost of 2 stamps.) Something tells me if you bought one of these $600 pendants, you shouldn't be too concerned about "Smart Meters", whatever those might be.