Jobs at small Pittsburgh companies nobody posts about - 6 months and counting

I asked around at a community meeting and got three leads. This is my first time dealing with any of this. One is a print shop, one is an accounting firm and one is a clinic. Should I visit in person?

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.