There's not as much drinking done as you would think and really it's either an after work hours thing or someone is coming in checking the place out and has a beer. It's really not a big deal. It's actually just more convenient because alcohol can loosen you up and means you don't have to go across the street to an expensive bar.
I believe you're taking an overly hard-lined approach to this. I work very hard, and so do many others. There's some who just dick around, but that's going to be in any office. I would ask you though, what's more conducive to meeting new people around the office? A light-hearted 5:00 / 6:00 drink at the bar right outside the work area where there's already other people drinking OR organizing everyone to go to a bar across the street and hope people show up OR just going to the bar?
WeWork is a great place because of the community it builds and you might very well argue it does that on the back of its kegs with taps labeled WeWork. Is this really so bad? Think about your typical startup who's struggling to get along. Isn't it better that they have others to talk to especially others who are going through the exact thing they are?
I genuinely think you can't understand all the psychodynamics at play because you're stubbornly holding onto your perception of a workplace should be. Hey to each their own, but I see a lot of positives in WeWork's approach.