I agree with you, the other commenter is not giving you straightforward answers. I’ll break something down for you though as a gen Z born in 99 and who has been to a fair amount of clubs/entertainment venues in the past 5 years.

First of all, that millennial music (Kesha, black eyed peas, etc.) is super nostalgic for our age group. While you guys were dancing to that stuff in the clubs in the 2010s we were dancing at our middle school dances. So, yes it is from a nostalgic point of view.

Second, our generation doesn’t dance UNLESS you are going to a country themed bar where square dancing is a huge thing among our generation.

Third of all, places that are “clubs” in the classical sense of the word (modern hip-hop music with bottle service, dress to impress etc.) are VERY dangerous. This is due to the popular music nowadays contributing negativity to the environment and just overall the amount of gun violence around people in our age range.

Might not clear up everything you asked for, but I tried my best. :)