Me and my neighbor are submissive while our wives are the dominants. When wives visit each other for coffee and chat, we (the husbands) mind the kids. My wife is less dominant than his wife and I am less submissive than him. But, since we knew them a few months ago, my wife started to be more dominant. Do you think that building good social relationships with them helps my wife be more dominant and I become more submissive? and how can we learn the most from our neighbors?

Building relationships with others in dynamics similar to yours can have many benefits.  You can pick up ideas and advice from them most definitely. As to whether you might make your relationship more than it is now, only time will tell. It is possible that your neighbor is where your wife is getting her ideas and desire to be more dominant. It has always been helpful in KM and my relationship when we are around others because we can be relaxed and enjoy our power exchange energy. Learning the most from them only requires time and conversation. If your neighbors are free to chat and talk about their relationship I'm sure you will pick up some things that could benefit your own dynamic.

Enjoy the new friendship!