With no one vulnerable, I opened one club in fourth position at matchpoints after three passes with the following:♠ J752 ♡AJ6 ♢A4 ♣ QT52. I did so because people at our club who pass with 12 high card points or more, even a "nondescript" hand, tend to get bottoms.
Partner bid one heart, and I passed, since I didn't see a way to a better contract. We got a top because all the two level contracts and 1NT failed. More to the point, this result was in line with my expectations, based on the way members of our club play.
Partner was upset because I passed him out instead of bidding one spade, with my four (weak) spades. He claimed that if he had four, we would have gotten a better score by making two spades instead of one heart. But he only had three spades, and as I feared, his three of my spades, K64 were worse than my AJ2 of his hearts. And if he had only two, we would have gone down at 1 NT or in a two level suit contract that we would have to escape to.
I felt that it was best to "leave well enough alone," and settle for "any port in a storm," that is, a contract that I thought would bring us a top or a near top.
Was my posture appropriate at 1) rubber 2) matchpoints generally and 3) at matchpoints within the context of our club.