Native English Speakers
No, the place doesn't have anything to do with dogs, nor can one jokingly say that they "treat you like one". The name comes from how it's number 9 on the street Karoly Korut, and no one ever alerted them, apparently, that K9 is a common shorthand for "dog" in English. (Or perhaps they did learn that much, but deemed it too late to change.)
Non-Native English Speakers
Hey, did you know that in English, K9 is a common symbol or abbreviation for "dog"? Yeah, it comes from how it's pronounced like "canine", the adjective for dog based on its Latin root canis. Remember that movie K-9? Yeah, kinda like that.
Anyway, I don't expect all of this internationalization to go perfectly for everyone, but, well, y'all could have saved me from having to explain stuff to a lot of people of different native tongues...