I agree with MamaPain. We run a very small business from home, and have one employee outside of the family. It is not any kind of eating establishment, but our employee is a very lovely man. I will often make him lunch if he happens to be here, give him dinner if his wife is working away, a birthday cake (when it's his b/day, obv). He gets a bonus at Christmas and a box of beer and a bottle of his favourite tipple. It is just right to treat an employee appropriately, as you would wish to be treated yourself.
Any tradesperson who comes to our house is offered drinks throughout the day, and snacks where necessary. I find that if you treat people well, they will bend over backwards to help you. eg, in the future, if you have an emergency situation, they are more likely to rush back to help you. We're on first-name terms with most of our visiting tradespeople. It is a wise thing to, to nurture a trusted tradesperson, who you are happy to have in your home.
We had a painter/decorator here for several weeks a year or so ago. He was a really lovely young man. He was a friend of a friend desperately needing work. Lived nearly three hours away, so stayed with a mate of his during the week, sleeping on his sofa. I fed and watered him well, and he did a wonderful job. He was (is) an absolute perfectionist and charged a daily rate but worked from early in the morning until late into the evening. One day he didn't turn up, and I didn't hear from him for a while, which I was quite surprised at, and couldn't get hold of him.
Turns out, he'd sadly had a nervous breakdown - I was SO pleased I'd treated him nicely, and not simply as a "workman" or "member of staff" or simply as a "business transaction". We got on really well, and he has since visited with his young wife and two little girls to apologise for letting me down, and we've shared a few cups of tea and a chat since.