I don't think this is the case in a lot of WeWorks anymore, i work in a WeWork and the majority of companies are now bigger corporates.
Goldman Sachs just took 2 floors in the WeWork next to us.
It's actually quite hard to find a largeish Co-Working space in London as it moves so quickly and so much space is being taken by corporates buying entire floors.
As far as I can tell, WeWork is not really a coworking business. It's a large-scale office space leasing business that uses coworking as advertising.