I appreciate the insight. I would not feel comfortable asking working adults to address me as Mr., and though I may possess unique information on a subject they're interested in learning, I think teaching on a first name basis is ideal. Thanks.

I've been recruited to teach an advanced marketing class for people wanting to improve their skill set for advancement. These are working adults from the surrounding community. I'm not sure requesting that the class address me as "Mr." is appropriate but I'm open to comments and suggestions.