Here's where I've been. My wife collects the pins, is a member of the Hard Rock Pin Collector club. She has a display from them.

Amsterdam
Bangkok
Berlin
Birmingham
Chicago
Copenhagen
Detroit
Hong Kong
Jakarta
Kuala Lumpur
Osaka
Las Vegas
La Jolla
London
Los Angeles
Manchester
Melbourne
Munich
Paris
Phoenix
San Diego
San Francisco
Seoul
Singapore
Sydney
Tokyo - Roppongi
Toronto
Washington D.C.