I think once a board game night starts making people upset and grumpy, it's time to find a new activity. I am the least competitive person I know, and love board games, but there often seems to be some weird angst that goes on--nobody can agree on a game and the person who gets outvoted feels like they 'always' lose out, or the uber competitive person gets angry every time they get beaten, or something. I find these things often work better when there's a larger group and it's not expected for everyone to play any one game, or the opposite, where everybody knows ahead of time what will be played. So, "Let's have an Arkham Horror night" and if someone dislikes it, they don't have to come along rather than thinking 'oh cool, board games', not liking the one chosen,and having to either sit out or deal with something they dislike. I personally really dislike Pictionary and Cranium or anything like that, and would far rather sit out than play them, but I am pretty happy doing that so long as I get to do at least some of the fun stuff that evening!