"Underground" restaurants are springing up across the USA, run by elite (and amateur) chefs who can't or won't go through the certifcation process necessary to securing a restaurant license.
But securing a seat at Mamasan's is not easy. The restaurant, which also happens to be Lynette's apartment, has no sign, and the only way you will ever find it is if someone tells you where it is (a quiet street, a hidden door, up a dark stairwell to the top apartment). Even then, you can't just show up: you must have an invitation. To get one you need an introduction from a previous guest. This may seem as if it's a complicated way to get a plate of grilled salmon, but Mamasan's Bistro is not a legal endeavor. Its kitchen lacks the certificates, permits and inspections required by the city of San Francisco. And although the coconut-mango cocktails flowed, Lynette does not have a liquor license.
(Thanks, Dan!)