I absolutely do practice my question techniques in private. When there's somebody that I meet and I don't think I'm ever going to meet them again, I just throw out a question approach to see how will they respond? I try to direct them. Tell me what you were doing this weekend instead of, so what were you doing this weekend?
I try it and see what happens. If I try it on someone in person and it doesn't feel awkward and I don't see a distance in the conversation, I think it's a good technique. Keep it in my, in my Google doc full of techniques for having better conversations.