It is a tricky subject. On one hand kickbacks are an obviously bad thing. However small gifts are good ways to start/improve relationships. I think that $100 is a good cap, and limiting it to the physician only seems to be a good idea. I’d want to learn more about what people actually do in terms of business relationship-building but a small cap seems okay. With the dinner example if it was a “double date” or a family with family event then I don’t see as much of an issue. Having a wife/husband be the only other person seems a bit odd and harder to pass off as a friendly get-together. There’s a lot of grey areas. Most people factor in personal like-ability when doing business, so as long as it’s a fair playing field and not too excessive I’d be fine with gifts.