Remus - Sirius
After sitting for awhile outside with Regulus, coming back into the house made the level of volume inside seem even worse than before to Remus' sensitive hearing. It was definitely time to bow out early before his head exploded.
He had to find Sirius first, however, so he could wish his best friend one more happy birthday -- and maybe smack him for not giving his brother a Christmas present yet! Remus wasn't letting that one go. Although, he'd be less obnoxious about it this way than if he'd broken up the dancing to do so as he'd threatened earlier.
Spotting Sirius, he made his way through the assembled toward his friend. When he reached him, he put a hand lightly on his shoulder to get his attention. "Enjoying your party, Pads?"