Is it possible that Campari could be running a campaign targeting people who recently visited bars that serve Campari? Or even simply people who recently visited a bar?
I definitely seem to be served ads based on recent locations.
EDIT: The "Behaviour" targets can even drill down to specific types of alcohol beverages (beer, wine, other). Not sure that means specifically having visited a bar.
or maybe it uses voice recognition to target users "interests"
While difficult to prove or test, it's possible that there is both a facebook ad campaign as well as some real-world campaign going on at the same time. Real-world being either forms of visual advertising that 'primed' you to also talk about it, or perhaps (attractive) people hired to buy/pitch Campari in bars that you may have overheard. Apparently that's a thing.
Basically, Baader-Meinhof strikes me as something that any advertiser who knows about it would actively use to improve their advertising.
There's a phenomenon that explains this kind of illusion as a psychological effect, called the Baader-Meinhof complex. Coincidentally later that night we mentioned it too. It's basically a trick our brains play on us partly explained by the psychological processing of information, selective attention and confirmation bias.
Or maybe Facebook is spying on me, on you, and Hacker News too.