What I don't understand is why groomers don't like the owners staying there while they groom their pets. I hate to sound pessimistic, but it's almost like they have something to hide. When I took Darla in for her first "happy" visit (bath and nail clip only), I stayed. The groomer wasn't upset, but I could tell she was taken aback a little. What the hell, she had a couch and I sat on it!
On the other hand, I was a hairdresser for years. Some people would bring their children in and they were so awful, I made the parents leave. After they were gone, I put the fear of God into the kids and they were such angels
Could it be it's the same with dogs?