I understand what you are saying Bill. But I cater to the bride. I actually have my own "Black List" for catering venues. As I cater to the bride's wishes, so should the venues.
I am considered very difficult to work with by the venues. This is a big plus for me because the brides know that I will make every effort to satisfy them, and to hell with unwilling venues.
One major venue here in New Jersey was so upset that I had black listed them, the owner invited me for dinner and we had a very productive meeting to discuss getting the venue off my list. (2 brides had cancelled their contracts with the venue because of me).
Today, I am the recommended DJ at that venue, and the venue now pays more attention to the bride and the success of her reception than they had previously. Their bookings are up substantially, and several other venues have implemented changes similar to theirs.
In today's wedding market, it's all about the bride!
(note: I have a half dozen venues in which I refuse to work in---I actually offer prospective clients a special discount from my rates, if they move their venue choice to one that works better for both of us)