At my job, we routinely have visitors come in and work with us for a few days. We also record (audio and video) parts of these sessions, but only when the visitors are in a particular location - the gear for this is not openly visible, but they are fully informed that they are being recorded. Anywhere else, however, anything they say is off the record.
So, one visitor is a big joke teller, he's got a million of 'em. We're all sitting in a common room on break and he's practically doing a whole routine. One joke, he decided was inappropriate for mixed company, but my one (male) coworker had been egging him on and really wanted to hear it. So, they go down the hall to a room where no women are currently present: the location with all the active recording information, and that's where the visitor tells the joke.