Jamie wasn't sure how Remus had convinced Regulus to come and what bribes were involved to make sure that he wouldn't say something rude, but then Remus was a Marauder, which meant he was resourceful. Now they had to see if his resourcefulness would win over Regulus temper.
Finally ready, all four of them Apparated where indicated and waited for their hosts to let them.
"Hello," he said, as they went inside. They hadn't really seen each other since the final battle and it was strange for Jamie not to be in contact with everyone on a daily. "Thanks for having us over. Just a little something from us," he said, giving then a bag with a bottle of champagne.