I suspect if you have something to say you can probably write it anywhere, but I'm on a mission to find perfect places to write.
Here is one of my favourite cafes. Because it is good, it's often busy, and I couldn't comfortably write while people are waiting for a table, so I need to find the quiet times.
On chilly winter days, they put sheepskins and rugs on the seats outside. Love it! (Though I went inside....)