In a cash game I wouldn't fold KK most of the times, at a tournament depends from the stage. If the tournament was at later stages I would go for it, considering the study of the game.
On the bubble for one person to the money, if I have less than 7 big blinds, easy fold
i am not talking about a bubble situation in a tournament but in general both in tourneys and cash games but especially in cash games
would you ever fold KK preflop ?