The main issue with Housefed / this thread's idea is that your site basically allows people to sell food without a permit. I would stay away from things like house events, because if even a few incidents happen at a house food event and people blog about it, you won't get in any legal trouble as long as you be careful in your TOS, but it's VERY bad PR for y'all. (e.g. remember the AirBNB fiasco?).
GrubWithUs makes sure their chefs are accountable for what they cook / prescreen all cooks. Private cooking is a whole another legal monster, lots of things to worry about. I think as long as you educate end users and watch how you word things legally, you should hopefully be okay :).
If y'all are ever looking to expand to Austin, let me know I'd be glad to help out / put you in touch with the startup community here!