Thanks for your replies. I do see the red flags, and I am uncomfortable with this whole situation. I definately do not want to meet and would not put myself in a postition where I am uncomfortable.

I am just confused as to why he is being so arrogant. I have known him for at least two years. He has brought up the fact, only once, that he would like to be able to train me. I had told him no. It was never discussed again.
We have remained friends and talk occasionally.

I know that he and his submissive like play with other submissives, so I thought that it would be okay.
I was confused as to whether or not he could call the shots because I was the one who had asked them to set up a possible play date.
I had assumed that we would first meet and discuss in person what was expected.

I am confused as to why I am being pushed into it. I can understand that he should be able to say what he wants to do as well, but that should be discussed first.

While I am aware that he is pushy right now, I wasn't entirely sure as to how much control he could have with this situation. Unless he thinks that I am easily swayed because I am not more assertive when I talk to him.