No, it’s not a good mug of coffee, though it feels like that way sometimes. Nor is it a writing sojourn in an enchanting land, though that can help. Bonus points for combining the two, but still not there!
In fact, one of the most successful authors of our time, J K Rowling, wrote much of the Harry Potter series in some very ordinary cafes in Edinburgh.
They were warm, full of interesting characters, close to shops and transport, had an endless supply of tea and the occasional scone, and nobody cared if you sat at the corner table writing weird stuff.