Never been to the olympia nor any olympia after parties, but ive spoken with several people who have been including a few pro's. supposedly most of the parties are cool, lots of people, alcohol, music, celebs and pro's..etc. but that is the kind a shit you can find any weekend in vegas (or any big city for that matter).
Craig titus used to have slammin parties, every body thizzed out of their fucking mind on Ecstacy, and from what ive heard basically most of the people were naked and making out, licking eachother, or just full on fucking.