This is a fascinating idea. I wouldn't want to do it in a private home, but it could be great fun in a common building at an intentional community or a university or some other semi-public place.
Inviting The World To Dinner
Every week for the past 30 years, I've hosted a Sunday dinner in my home in Paris. People, including total strangers, call or e-mail to book a spot. I hold the salon in my atelier, which used to be a sculpture studio. The first 50 or 60 people who call may come, and twice that many when the weather is nice and we can overflow into the garden.