At my last job they liked to play diplomacy online. With 2 day turn times. I ended up quiting the game because I couldn't think about anything else.

Trying to work out which of my colleagues would betray me, and what the best position for my units for the next turn.

I don't consider myself particularly competitive, but the need to minmax was strong with that game, and the social/diplomacy element was just infuriating.