I haven't actually listened to the radio or muzak in awhile. I mostly think about what I want to hear and get to it some other way. The last time I remember really listening to radio airplay was in the dentist office. They were mostly playing 70s and 80s music or oldies but not really old oldies. I listen to a lot of talk podcasts so I guess I miss out on all the fun. You must be talking about acts like Brittany Spears, Madonna and Lady Gaga. Or maybe the rap centric music or TDM or whatever it's called.... most of that music seems to be written for the really young to the young. They want to dance and they need a reason and it doesn't take much of a reason.
There are exceptions to almost every loose rule. There are probably plenty of older house wives jigging to those tunes around the house or older working women trying to loosen up a bit. I can't say I've ever heard a radio at a construction site blaring Lady Gaga but maybe I haven't been around.Lots of younger folks still like classic rock and roll.
I know this will be seen as a stereotype- I don't see the logic in playing music that only appeals to the very young because as a population segment it's the older folks who have the most of the dough. Maybe it's the small percentage of the young who have money to throw around that they are after because the older people are a little wiser in terms of money(usually), so you won't find that crowd at a casino.
On any subject like this I find it difficult to really make any across the board judgments as most norms in some places are exceptions in others.From week to week who knows who will show up in Vegas?
Just a guess, but maybe that kind of music loosens up a persons inhibitions better than other types of music. They want a quick to act person with a full wallet ;) Three cups of coffee and a catchy Madonna tune and look out....especially if you have ADD. Disclaimer- I had coffee before I wrote this.There may or may not be a grain of truth to it.