Word-of-mouth leads in Charlotte

Two small Charlotte employers told me they are hiring but have not posted yet. This is my first time dealing with any of this. They prefer people who can start within a couple of weeks. Does anyone have similar leads?

Visiting in person worked for a trades job. For office jobs, email was better.

A short email with two sentences about what you can do and your résumé attached worked for me. I followed up after a week.