Jobs at small Honolulu companies nobody posts about - any advice?

I asked around at a community meeting and got three leads. I have read a lot of threads here and could not find my exact situation. They prefer people who can start within a couple of weeks. Should I visit in person?

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

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