Who cares.
I am not an AA pilot, but here is my take.
Yes, it is an expensive dinner. However, it is less than 2 hours of Captain's pay each. I'll bet each of the participants put in more than 2 hours of extra work on the contract.
If you didn't like the contract, then you should have voted against it.
It passed, so move on.
Life is too short to harbor anger - get over it and focus on the future.
If you think this is bad, take a close look at ALPA.