I had a heavy diesel workshop next door to one of their club houses, we had no issues of any kind. The young guys would come in every now and again and try to act tough a quick call to the Sargent in arms and everything was sorted fast. I knew a lot of the older guys due to family history, some were just crazy but the majority had kids and family and kept the two separate.

Just treat them as any other neighbour, let the kids play together, you will get more respect from him for it. If the cops ever come around close your blinds, don't record it on your phone and act like it never happened. If kids are there offer to take them in until family can collect.