In 1927 when my grandfather began practicing law, this was a viable method of marketing and rainmaking. There were only 131,000 attorneys in the United States. If you averaged this out, there were only 2,620 lawyers in each state (yes, I know that some states and cities had more attorneys than others, I’m making a point here). You could literally hang a sign outside and people would hire you.
Now, 90 years later, in 2017, this method of marketing and business development is just not going to work. According to the ABA there are more than 1.3 million attorneys in the country and unless you find a way to let people know what you do, they will never hire you.