Leave it to Crowley to be hiding in the shadows. Never the less, Aziraphale was pleased to see him there. He moved over toward the Crowley, greeting him without using his name.
"There you are, you old serpent. Here," he moved in closer than necessary, giving the demon a wink, "try a piece of the calamari." In a hushed tone, he continued, "That angel is the one I was telling you about. The one that thinks he's looking for you." It probably wasn't the most sinless thing he'd ever done, choosing to warn the demon rather than alert the angel. But he and Crowley went way, way back, and this angel...Aziraphale still wasn't particularly comfortable with Castiel.
Heading back to the table, he filled himself a glass of wine. "Anyone else? I mean really, if he's right," he tipped his head in the direction of Crowley, "we might as well enjoy it. Must be a reason the City got us all together. Any ideas? Anyone?"