Poker, a non-zero sum game played like a zero sum one

[laja]

I know that poker is a non-zero sum game because of the rake that is payed. Not everyone's losses is another's gain, (I don't consider the house a player) But my question is:

Is poker a non-zero sum game that is played exactly like a zero some one?

There are no instances in which players, who aren't colluding, to work together. The only situation in which players can work together and all gain is when the nuts is flopped and they don't bet/cap trying to get idiots out, but also increasing the rake.

What do you guys think?