A
game in which the
players are all
friendly towards one another, or are not playing for any
gain, for example: a friendly
soccer game would imply that its either a game played with your friends down the park, or that its a game played by
professionals, but there are no
league points or
cup to win, it is a
game for its own sake.
Most sports have some form of friendly game. And most non-sport type games by their very nature are friendly.
In poker there is no such thing as a friendly game.