Tourist/Visitor Categorization

I think the integration of a way to categorize visitors/tourists would be a great idea, so that clubs can keep track of actual members versus visitors from out of town. For example, my club has over 30 thousand registered members, yet we know that number also includes out-of-state visitors. The category would help us when doing bulk emails and being able to distinguish whos an actual member that lives in town. Lastly, this feature would greatly benefit clubs that are not membership-based.