Here is a sign at a local Jimmy John's sandwich shop.
While there are quite a few ways to interpret this, the most literal would seem to be that they would love for you to wear as little as possible. With the code requiring shoes and shirt, I suppose you could just plain do without trousers or anything else and show up for lunch. How about wearing just sneakers and a t-shirt that says, "Don't Look Down."
Keith Christenson - Wildlife Biologist