Going door to door to a variety of businesses, some hiring minimum wage while others are looking for people with multiple degrees, is not a great strategy. Best to drop by ahead of time to scope out the territory.
One of my former students applied for a job with a computer gaming company. He had an interview and asked me if he should wear a suit. For this particular company I suggested he call HR and speak with the secretary and ask her (him?) what is appropriate dress for a job candidate. She told him the firm’s employees dressed in plaid and denim and he should dress the same. He did! He got the job!!
I always told my student if you are uncertain about what to wear call and find out.