I like to keep things simple - fees are due 49 weeks a year in full (less my 3 weeks unpaid vacations) no matter if there are stat days, sick or missed days for any reason.

Here's a phrase for you that works for me: 'According to our contract......blah, blah' They signed it and agreed to it, PERIOD! Be strong and confident and don't give in to any pressure. You are running a business. The other ladies game you some great scenarios, if you miss a week at the gym you still have to pay for your membership is one that I've heard before.