Although I have lost interest in HRC's, I was a huge pin collector about 12 years ago and visited the following cafe's during the time I collected:

San Francisco
Sacramento
Los Angeles
Hollywood
San Diego
La Jolla
Phoenix
Las Vegas
Lake Tahoe
Guadalajara
Mexico City
New York
Boston
Miami
Orlando
New Orleans
Chicago
Bali
Iceland
London
Paris
Niagara Falls, Canada
Niagara Falls, USA
Toronto Skydome
Toronto
Montreal
Ottawa
Beijing
Osaka
Tokyo
Kobe
Cancun
Acapulco
Puerto Vallarta
Singapore
Bangkok
Atlantic City
Baltimore
Denver
Gatlinburg
Hollywood, FL
Honolulu
Houston
Key West
Philadelphia
San Antonio
St. Louis
Washington, DC
Newport Beach

I was just in Dallas and noticed that the original location is now closed.