"What do you do?", when asked in the USA really means "where do you work?" I've always taken care to answer this question stupidly as I don't much care for it.
I've long thought of possible creative answers, like "I process the Visas and Mastercards at the Miniplenty.
I also process the chickens at the Miniluv. I've always been sure that they needed my help.
Also, beware if someone preaching the Gospel has "Ministries" (in the plural) as part of their
business church name. It means something.