At the coffee pot:

Coworker: "Hey, so, do you shop at Costco?"
Josh: "Oh heck yeah, the only place I shop most times."
Coworker: "Well, their apricots are particularly good this time. The wife brought some home, and they are choice."
Josh: "Cool, I'll have to check them out. I've been particularly enjoying their grapes."
Coworker: (continues to pour coffee in silence, and then leaves)

I feel like I insulted them somehow. Or that maybe they were like the mindless NPCs in video games, with only one or two pre-programmed responses, after which they discontinue their conversation or start repeating what they said.

Whatever. Sanity is a small price to pay for coffee.