I am a digital nomad, a laptop worker without a steady office. The advantages of that is that I don't need to be at any place, the main disadvantage is that most of the time (here in Dublin) I am working alone, which is quite boring after a while.
Now, when I am in London, its a different story, there is The Hub. The Hub itself is a rather nice shared office space in angel, where you can rent out hotdesks for a couple of hours a month, days, weeks or the whole time. But that is just the building, the space. The bit which in the end is much more interesing are the people working there - lots of projects concerned with social change, sustainability and ethical business. Some of the most interesting people I have met - and all in one room. This makes coffee breaks there so darn interesting, and people learn a lot from each other. Just hanging out there is inspiring.
What would be required? Maybe a website, to announce the meeting point, and show who the members are. Then we need the poeple themselfes, so word needs to be spread. Most important are welcoming places, cafes, hotels and other spaces which are open to the public, and ideally provide free or cheap internet .