Etiquette Tip: Business Meeting
"When dining out for business, always keep in mind you are there to do business first and eat second. During a business meal or interview, never ask for a doggie bag for leftover food, no matter how much food is left, or how much your dog would appreciate it. (Your dog never has to know.) Do not ask for it, even if it could save you from having to cook at home the next day.
Do not ask to sample an interviewer's or client's food. If an interviewer or client offers you a sample of his or her food, you may accept or politely decline. Business first. Food second."