As a tax concept, “entertainment” can be relevant not only to fringe benefits tax (FBT), but also to income tax and even goods and services tax (GST).
For a business, whether a business expense is “entertainment” will generally also determine whether the cost is deductible. If the expenditure can be shown to be directly connected with the carrying on of a business, it should be deductible.
The example of someone taking a client out to lunch can certainly be shown to be in connection with a business. However, there...