Surely you provide your customers something more than just a building with some trainers in it? I'd focus on that, rather than silly contract games.
As a consultant/freelancer/employee you have the luxury of just worrying about what's best for you and that's it. As an employer, it's in my best interest to protect the business, otherwise people could be out on the street. If we mess something up with a contract or fail or do some "silly" thing correct it can literally ruin someone else's life through no fault of their own.