After my 6th gym session, I made an appointment with one of the trainers to be smart carded on the Curves smart card system. It's basically a chip in a piece of plastic that you insert into a slot on each machine which then calibrates to your first round while programming the chip.
The evil part is that this chip knows, it knows I tell you! I can't fake it now.
After the session to programme this evil piece of plastic, it was time to be measured and weighed. My boobs are shrinking. Nothing else is.