Atlanta	Boston	Chicago
Cleveland	Dallas	Kansas City
Minneapolis	New York	Philadelphia
Richmond	San Francisco	St. Louis

The answer is that all are cities in which a Federal Reserve Bank is located (or as Delmar stated, where U.S. currency is issued).

Correct answers came from  Delmar Burkitt,  Bob Fritz,  Alma Litten,  Alan McDonald, Carla Nuenke, and  Nick Wolf.  That's by far the most answers received on any Quest puzzle to date.
 
 
 
 
 

For the November Quest the question is what do the following have in common?

Altitude	Sex	Zotics
Meteor	Zigs	Liquid Lightning
Wisdom	Gravity	Tsunami
Fire	Sky