In Denmark it’s probably Snave (No English Wikipedia page for it). Population is a whopping 211 people. It was popularized in a series of commercials for a Danish cellular carrier. The concept was so popular that there even was a movie. I haven’t seen it, but the reviews seems to suggest it could be fun to watch… If you are drunk enough.
The word “snave” in Danish can somewhat be translated to snogging in English. Heavy kissing. Which has led to the city having massive problems with theft of their signs.
I’m curious, is there a reason you use Baikal over Nextcloud for cal-/card-dav?
I would probably be happy to not have to run an additional service, so I would have to have good reasons to run Baikal next to Nextcloud. Then again, if I had already setup Baikal and then, sometimes later, Nextcloud, There would probably be a great span where I ran both :D