Of course I'm not assuming cocaine was present at a party just because it still had a lot of people at it! I was simply saying that the bust happened at or near the Classic Center (right?) and involved at least one member of UGA's Greek community. I happened to be at that location earlier that night and two fraternities were holding events there (that I know of). I can only speculate if it may have possibly involved Sigma Chi because the Delt party was broken up by that point. That's all I was saying.
ETA: The article says they were arrested at the Classic Center.