Men with Dogs Go to a Restaurant – Level 3

Peter and John are walking their dogs when they see a restaurant.
“Let’s go in and get something to eat,” Peter says.
“We can’t,” replies John and points at the “NO PETS ALLOWED!” sign.
“Ah, the sign… Don’t worry about it!”
Peter puts on his sunglasses and enters, but the doorman stops him.
“Sorry, no pets allowed.”
“Can’t you see?” says Peter, “I am blind! This is my guide dog.”
“But this is a Dobermann – who uses a Dobermann as a guide dog?”
“Oh, you haven’t heard? This is the latest type of guide dog! They do a very good job!”
John sees that Peter’s plan is working. He puts on sunglasses too and tries to get into the restaurant with his Chihuahua. The doorman quickly stops him.
“Don’t tell me that a Chihuahua is the latest type of guide dog too!”
“You mean they gave me a Chihuahua!?”