It sounds like they were not aware of the wedding until late in the game. If you follow the arc of culpability throughout the post, Parker assumed that the Hotel was adequately permitted for such activities. When it turned out that they were not, the Hotel forced Parker into a indemnification agreement (presumably by threatening to cancel the wedding), which means he can't sue the Hotel. Then the Hotel refused to pay the CCC fine, preferring to cancel the wedding instead. So his only option at the point was to pay for the fines himself.

My take away from this is that the hotel is to blame. They did not have the required permits (despite an assumption on Parker's part that they did), and they refused to rectify the situation when it was discovered that there were issues. Parker seems to go easy on them, my guess is because he has some connections to the owners (in my opinion, his best defense would be to turn around and point fingers at the Hotel owners).