Small employers hiring around Honolulu - first time posting

Two small Honolulu employers told me they are hiring but have not posted yet. Thank you in advance. They like a brief email with a résumé. Should I visit in person?

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

Small employers often hire on recommendation. Ask neighbours, former co-workers and your library.