Is there a Makerspace (you can Google your address & “near me”)? They usually have CNCs and folks who glom together so might not need a separate dedicated CNC users group. Also, a woodworking group might have several CNCers. And if there’s a voc-tech college nearby, they may have folks too - you don’t need to be a student in a program to sit in but may need to sign up for a class to be able to use their machines or participate in class-sponsored activities.