For some reason, the end of the sofa is THE best place. I don't think either of them have been on one of the dog beds at the same time, its always one on the sofa and one on a dog bed.
Tonight, Sofy was first:
Then after their supper, Wiggle took his turn:
And when I was making myself a coffee, Sofy took my place!
As I type, Wiggle is in the dog bed again and Sofy on the sofa, snoring. Happy, contented, sofa-sharing Labs.....