Why use infinite loops?

Question

Another poster asked about preferred syntax for infinite loops.

A follow-up question: Why do you use infinite loops in your code? I typically see a construct like

Answer 1

while( 1 )
{
    game->update();
    game->render();
}

Edit: That is, my app is fundamentally based around an infinite loop, and I can't be bothered to refactor everything just to have the aesthetic purity of always terminating by falling off the end of main().