If you own a business, you must have a page on facebook with your picture and your business description and contact information.
Even when I was a big user of Facebook, I never, EVER used it to contact businesses. I looked for their web page.
That being said, I was in a few bands that tried to use it and it was marginally successful. But only marginally. For all of them, if it got serious, we created a web page.
Facebook is really just a toy to me. Always has been.