In the end, I got a free hair colour and an expensive shampoo and conditioner set. I went to shake Frederik's hand in the end, as one should after a business transaction--I thanked him and wished him well, and he said, "I suppose I'll see you next time we're here?"
Apparently, it hadn't mattered that I wore a blue blouse instead of the required black.
"Sure," I shrugged. "Why not?"