Does your DJ consider many guests may get upset if they’re not told the bar will close during dinner? Even last call, they would like to be informed. Some of them want to run over and grab two more drinks before they can’t any longer.
My wife was upset during my brother’s wedding because she was nursing and couldn’t get to the bar in time. She wasn’t getting drunk, she just wanted a little red wine.
Make sure your DJ always is considering your guests, what they want, and how they’re feeling.