I have had some (not a ton, but a bit) of social skills training, which was behavioral in nature. I found it to be somewhat helpful. I think the main thing that I learned was that I needed to practice making facial expressions that match what people are saying to me. Also, I worked on how to pick up on key things in a conversation to make the conversation progress, which I can do fairly decently. Also, I practiced walking more naturally, which comes easier at some times than others.
However, I have done CBT for other things, and it was helpful. Like, I used cognitive-behavioral strategies to deal with my anxiety and eating disorder, and it was really effective, in my opinion.
I generally don't do CBT in therapy, though, I generally just talk about whatever I want to.