Sometimes they can. I know of a particular example in the town I used to live near in NC. When I was in high school, the neighboring county decided to become a dry county (no alcohol). The local country club was appalled. (I should add that this country club was inside of a gated community. They had their own club, golf course, lots of houses, and other amenities within the gates.) They decided to succeed from the town and the county they were currently a part of. At the time, that made them the smallest town in the state not to mention the only town that was completed gated off. They kept their alcohol at the club house, but they lost a lot of privileges of being part of the larger town and county around them. I'm not exactly sure how they did it, or if they chose to stay that way. I do know it can happen.