Do you like to cook? Throw dinner parties? Many people enjoy that, but paying for the food, plus accessories, is expensive. Would you host more often if you could get your guests to cover the costs? Or suppose you'd like to go to a dinner party to meet new people in your neighborhood. Or maybe when you travel, instead of eating at restaurants, you'd like to see how the locals live. Good news! Today both cooks and diners can get what they want. A new Internet business brings them together. The bad news, as John Stossel writes, is that bureaucrats and the media worry that the dinner parties are not regulated.