Etiquette: Business Dinner Mistakes - as part of the expert series by GeoBeats. When invited to a business meal, it is more about the business and less about the meal. That means you should never arrive to a business meal hungry. Eat something before an event so you are not famished, and if alcohol is served, drink in moderation or not at all. And never, ever talk with food in your mouth. Business dinners are great for building relationships, so try not to talk shop too early. And always thank your host at the end of the evening, and the next day, follow up with a phone call, or email or better yet, a handwritten thank-you note.