As dog owners we need to train calm into our dogs so they pay attention and don't act out in public or new environments. It is pretty easy to do and if you walk him twice a day you are already putting in the time. Now to just redirect your efforts to train your dog to be calm in new situations. This works with all breeds of dogs and is more about specific training instead of just letting it happen.
These are a few of the basics:
https://www.youtube.com/watch?v=rQnIWkKJF1g