We are at my parents' for the weekend - they have an adult golden + got one of Marcy's littermates, so there are 4 goldens here. We have the kitchen gated off, puppies in the kitchen, adult dogs in the rest of the house. We introduced the puppies and the adults, but they aren't together full time yet.
Doggie D seems pretty on board. He tried to play with her just like he plays with every other golden he meets. She sorta got it. Once she gets bigger I think it'll be good.
My parents' dog is a little more skeptical, but I think he'll come around.