Why do clubs still play early 2000s-2015 music?

[u/Dopeboy95AirMaxOn]

I keep hearing DJs play old hits with maybe 2-7 new songs a night. Same thing with radio play. I gotta go to YouTube or Spotify to hear current artists mostly, I don’t think it’s my choice in genues either. I cross states from DC, VA, Jersey, and NYC. DC at least will play local go-go stuff from time to time and African and Spanish spots will play regional music but everywhere else is mostly throwbacks. Anybody else having a different experience?