My late wife and her parents often needed a fourth for Bridge, so I sat in and we occasionally won, my wife and I. No one ever played Bridge with less knowledge of the game than I did, and I astounded myself by actually bluffing through games. I thought they might be carrying me, but they were a game-crazy family, so I doubt they were. I think I was a sort of idiot savant at it though I never played again. My family had some word games -- Dictionary and Categories for example, and played some Parchessi, which seemed like a pretty subtle board game at the time.