When 2 players sitting next to each other are in a hand together and one of them shows his hand to the other player, without showing it to the rest of the table...is it bad etiquette to ask to see the hand?
lol, I am wondering about this question coming from you. Simply because I think you know way too much about the game to not know the answer to this question.
Show one, show all. It is bad etiquette to show any single player your hand and NOT show the rest of the table. If I see someone doing this, I will call them out immediately (I play mainly home games). At a casino game, the dealer should call them out immediately.
So, no, it is not bad etiquette at all. Just the opposite.
I did not read all the other answers, but I would not be surprised to find out my answer was very redundant.....
EDIT: LMAO@myself. I just saw the OP is almost 3 years old....lol