Cha cha

Spotted in Kanda: nostalgic advertising. The coffee shop doesn’t seem to be there anymore but the sign lives on.
I think it’s from the early 60s, judging from the building its painted on, the typeface, drawing style, and the name–cha cha hit its peak as a dance fad in the late 50s. And the name’s a pun. Cha means ‘tea’ in Japanese. But with the dog pictured, I wonder if this Cha Cha was the owner’s pet?
Just below the sign is a koban, a neighborhood police station, complete with policeman on display with his patrol bike: