Calculate how many times per week or per month you plan on coming to class. If you come 3 times a week or more, a pass will work best. If you come 1-2 times a week or less, class cards are better. An example: the 20 class card (valid for 6 months) gives you access to all classes and works best if you come 1 or 2 times per week and are regular in getting to the studio; if you travel a lot with work or anticipate weeks where you won’t be able to come practice it is better to take another class card, with fewer classes so that you don’t lose any at the end of the card’s validity.