Regus offices are soulless. Well...they're (in my experience using them in the SE US) generic, quiet, generally well run. So, about as soulless as any office. Which was pretty much what I want.
WeWork's product is better.
Excepting Regus being profitable, having a better financial structure and management that's not a liability. But I understand that's not the only measure of 'better'.
The one I know in SF is an OK place to hang out in the evening.
I can't imagine anything I'd less like to do after work than hanging out drinking beer with a couple of dudebros with nowhere else to go after work than...work.
If WeWork is the only fun office space, they'll be hugely profitable someday.
I'm certain there's a market for work-space-as-life-substitute, but my own equally unsubstantiated feeling is that when people look for "workplace" they have one thing in mind, and when they think "fun", they're looking for something very, very different. At least for me, I don't want to try and work someplace where other people think it's for fun; fun is distracting.