Re: Dean, Susan and Seamus
Seamus had left Ernie to continue his mission to dance with everyone in the room some time ago and had, indeed, been spending his time preparing some of his fancier cocktails for the guests. When he spotted Dean up and moving, though, he decided it was time to check in with the birthday boy - and make sure he knew he could crash in Seamus's flat if he got too trollied to apparate home.
He waited on the edge of the dance floor for a moment, then stepped carefully up on Dean's righthand side, grinning at them both. "This looks cozy. Room for one more?" He put his hand on Dean's arm and slid it up over his shoulder to the nape of his neck, moving slowly so as to be certain not to trigger Dean (on his birthday, of all days, would be terrible bad luck). "Fancy being the middle of a sandwich?"