a problem (mere flotsam and jetsam)

I missed both of last week's yoga classes. There are 6 more scheduled over the next 3 weeks, then it's over. Because of travel and rehearsal commitments, I'll miss 4 of these. Does that make it more or less tempting to schedule something that would preclude going to one of the remaining two classes I can attend? And if I do that, what's the likelihood of my going to the last one? And does it make a difference that I'm wasting only around $5/class?