"No," said the heavily-tattoed owner, "But here is list of designers I know that ALWAYS need good copywriters." (Emphasis mine).
If you still need a reason to start cold calling or cold walking-in, it's that you get boots-on-the-ground intel you can't get from an email blast. A simple conversation may not yield an immediate sale, but can lead to many more.
If you are walking in, you can see if the business is busy or not, are they growing or not, what new developments are in the area, etc--information that turns into leads and sales.