That sounds like a large number of people for a class, compared to what I'm used to. Not ideal. I guess we're lucky; we usually have between 6-18 people (usually about 10) and two instructors with an assistant.

Here's another example for something similar. We had one leader who would grab the woman's fingers (not hand) in quite a tight grip, which not only was uncomfortable, but made it difficult to execute turns. I finally figured out how to beat him to it. As he reached out, I'd put my hand into his and slide it up so he HAD to grasp my palm, rather than squeezing my four fingers. He got the idea.