Damn, I saw the headline, thought “Did someone finally…” But no, it’s not a YubiKey (or similar) in the form of a signet ring.

It’s a finger mounted microphone with a non are chargeable non-replaceable battery.

I’m generally in favor of privacy, but a bar is public place. There is no reasonable expectation of privacy. Unless they’re putting cameras in the bathrooms, I don’t see how this is an issue. They likely already have security cameras that are recording, this just makes some of those publicly viewable. Other than an additional layer of convenience, how is this any different from walking into a bar, seeing it’s packed, and leaving.