Some places in which I know people can take their dogs/pets to work.

Vet
Animal Shelter
Pet Food company or pet toy/related materials company

However I would believe it should be up to the nature of the dog. My old boss takes his little fluffy dashound to work with him but this dog is so small, no one minds. He simply wanders around and curls up on his dog bed all day. I certainly however wouldn't be happy to meet a medium to large sized dog inside an office unless the dog was very old and slept all day.

I know of a bookshop cat. The shop had a number of cat beds (including the front window) which the cat slept in most of the day. When the shop was sold to a new owner the cat went with the bookshop. Customers knew that a cat lived there and actually asked for him.