Okay honestly I get OP's whole thing about not being actively mean to service workers but people who get wayyyy too self aggrandizing over how *nice* they are to service workers kind of remind me of this picture. Like, they actively force them to indulge in laboured smalltalk, as if they're doing them some kind of favour. The whole time they're just boring them, me, and everyone involved, just for the ego-stroke of "I'm so nice to service workers". It feels like they internalized reddit advice about how to be a "nice guy" a little too intensely.
This video honestly captures the vibe perfectly.