I can second Vancouver, and will raise you any big city in the USA - most of Latin America as well. Only thing that changes as usual is regionally based music tastes, though I find that people actually dance a hell of a lot more outside the anglosphere
Europe is a given but I hear Asia is popping off too. I have friends in Oceania who do some work around the scene. Really it's all over the world, people never stopped partying it just goes a little more underground here and there
Those are the best places these days. It sucks when clubs get closed in urban areas but there's still plenty of parties happening where you're bothering nobody, and nobody will bother you.
I think I'm at the age where I'm more interested in participating as someone actually creating part of the entertainment if I'm going to feel like I'm having the best time though, I think that's probably the best way for anyone to get into it. Lots of volunteer opportunities at festivals and of course paid gigs you can do. If you're a programmer, maybe getting deep into visuals is a way you can have some fun contributing too.
There are raves happening in warzones and even places you think there would be authoritarian crackdowns like China
Europe is a given but I hear Asia is popping off too. I have friends in Oceania who do some work around the scene. Really it's all over the world, people never stopped partying it just goes a little more underground here and there