On Facebook this got a bunch of comments saying things like "#Denver used to be #cool X years ago!" but nobody can agree on what X is. So far I've seen 10, 15-20, and 25. Do I hear 30 ... 30 ... going for 30 ... do I hear 35 ...

https://www.westword.com/news/denver-named-one-of-the-coolest-us-cities-heres-why-24175783

I've lived in Denver most of my life. Ten years ago people were talking about how cool it was ten years before that. Fifteen years ago they were talking about how cool it was fifteen years before that. Twenty years ago, well, you get the idea.

So I'll stake my claim: Denver was coolest when I was young and had a cheap apartment and no adult responsibilities and could stay up all night and still function the next day. Just like it was for everyone else.