The class packs are designed so that you commit to 5 classes in a row.
Ideally you would book them before Monday’s class and commit to every class during that week (M,T,W,Th,F).
However, if you purchase the classes before Wednesday’s class, for example, no problem! You would then commit to 5 classes in a row starting Wednesday (W,Th,F,and the following Monday and Tuesday). This rule applies to booking before any day in the week.