Doggy Diner was a fast food chain that operated from 1948 to 1986, in the San Francisco Bay area.
It was known by its 7-foot tall Doggy Heads.
This head was placed in the divide of a busy street near the zoo by the city of San Francisco
and is now a city historic landmark, and reminder of the now defunct food chain.
More info can be found at:
https://en.wikipedia.org/wiki/Doggie_Diner