Stop annoying people in art galleries or squatting coffee shops, and just get a co-working space.
Or just rent a incredibly overpriced office space in airbnb, that will do as well
For some people it's the specific vibe from a coffee shop that makes them productive. For a while after Uni I'd be more productive in pubs than anywhere else from spending time working in them during Uni, it took a long while to get out of it.