Don't be misled by sales person reporting "everyone loves this layout." Of course they only have limited space to sell and you don't get to see it in action.
Know your rights as a meeting planner - BEFORE signing the contract.
If you invite an audience to an event carefully consider the message, program and production targeted to your specific audience. Wikipedia: "It's the economy, stupid" is a slight variation of the phrase "The economy, stupid" which James Carville had coined as a campaign strategist of Bill Clinton's successful 1992 presidential campaign against sitting President George H. W. Bush.
Here are a few examples how clients did not follow my recommendations.
Clients expect us to manage the venue, the vendors and the on-site production, including planning, move in, rehearsals and calling the show.