answer:I used to work for a large company in the San Francisco bay area and Business Professional would have been a suit and tie, but Business Casual would have been a more casual button-down with slacks/khakis. If you are on a budget, you could just wear the shirt and pants from the suit, without the tie and jacket. If it’s the fashion industry or some other industry where people are really into looks, I might not do that, but for most industries, it will be fine. Biz Casual This shirt with jeans, would be perfect for Dave & Busters as well. Biz Professional