Who can benefit from Emotional Intelligence training?

I was talking to a friend of mine over the weekend about his struggles with two of his managers at work. When he finished, I introduced the concept of EI training to him. He's talking to a few other directors today. He said that's exactly what we need. They are also struggling with employee retention. I told him there are several businesses that have already improved their employee retention with EI training. Hopefully we can help them soon.