How do I add group fitness classes?

I attend Les Mills Body Pump, Body Balance and Body Combat fitness classes at my local gym. How can I add these to my Workouts as the routines change every 3 months and there are numerous excercises done throughout each hour? Do I need to specify each and every excercise (I can't remember them all, I just follow the instructor!). Thanks.
 
silly I’m unsure
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