Zumba Problems

At the beginning of this school year I got myself a gym membership because it was only $20 for the whole year. Why not, right? Anyways, I've been going to a couple classes a week pretty regularly and the Zumba instructor is always late. Sometimes ten minutes or more! And when it's only a 60 minute class that's kind of a lot. It always makes me a little irritated because Zumba is the one class that I want to start on time because it's the most fun. I wouldn't really mind if Pilates or Spinning started late, but I guess it's just one of those things. I think if I can make the effort to get up off my lazy butt and go to the gym, I should be able to expect the class to start on time. Just a thought.