Back in the day when I was working, yes, we had business dinners all the time. Business drinks too. Not always a fun evening, I prefer to spend social time with friends rather than colleagues but it wasn't optional. My husband has a business dinner probably once a month but he seems to have nicer colleagues than I used to, so it's not so much of a chore! We also invite his friends from work round for dinner at our house quite a lot, as we enjoy entertaining and I like meeting the people he works with. This is particularly nice for those who are travelling and fed up to the back teeth of hotel and restaurant meals, as they can come to our house and have a lovely home-cooked meal.