I'm don't think location is being searched when you are on the member page and put in a location.
You can always used something like Google and site specific search looking for the location that way. Since not everyone puts a location it may not help much.
On Google use -- site:http://www.chess.com/members/view YOUR LOCATION
I'd be looking for the name of my local club, to see if anyone would be a c.com member, but maybe "Location" isn't a searched field? What fields are and are not being used for search? Or would it simply be too heavy on the database?