It's helpful to look at old subscription prices when trying to set new subscription prices. The current price for admission to a single Tuesday dance is $2 for students and $5 for non-students. (Until the summer of 2007 it was $3.50 for non-students. At that point, it increased to $4 (to include early rounds), where it stayed until summer 2014. For that full time period, it has been $2 for students.)
Starting in Fall 2015, we started using a sliding-scale subscription model. We also changed subscriptions to include Saturday dances. With the sliding-scale subscription price, the higher end of the price was typically set so that it represented a very small (or even negative) discount on paying single prices for all dances, so in essence, people paying the higher price were giving a donation to the club. Nevertheless, people seemed happy to do that, and the sliding-scale model appeared to be a success.
Class members get their first class free, so to be sure there's a financial incentive for class members to buy a subscription, the subscription period starts the second week of class and finishes the last week of class. This exactly determines the dates of all of the subscription periods. The dates for class are determined by the PE calendar which is related to the academic calendar.
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