"Speak of the devil!" James grinned widely and slung an arm over Peter's shoulders, pressing the bottle he'd commandeered from Sirius into his hands. "You're just in time for the festivities to begin, my friend." He glanced around at all his mates, grinning like a madman. "Tonight we make our mark, gents. Everyone will know that the Marauders were here." Yes, that was a promise...quite possibly a small threat.
James took up another bottle and popped it open. Now was time for the party to begin.