Finally, a theme which lines up with my "hobby"! Too bad some of these are a bit shaky.
Fairmont Empress - Victoria, BC
http://www.flickr.com/photos/24723059@N00/539995046/
Doubletree - Pittsburgh, PA
http://www.flickr.com/photos/24723059@N00/540003524/
Millenium Hilton - NYC
http://www.flickr.com/photos/24723059@N00/540100325/
http://www.flickr.com/photos/24723059@N00/540100317/
Hilton Copenhagen Airport - Copenhagen, DK
http://www.flickr.com/photos/24723059@N00/539995044/
http://www.flickr.com/photos/24723059@N00/539995034/
Edited to add:
Hilton - Pittsburgh, PA
http://www.flickr.com/photos/aa440/2236235896/
Hilton Anatole - Dallas, TX
http://www.flickr.com/photos/aa440/2236248326/
Hilton Garden Inn SFO - Burlingame, CA
http://www.flickr.com/photos/aa440/2245824062/
Doubletree Suites - Tampa Bay, FL
http://www.flickr.com/photos/aa440/2245030021/
Rio - Las Vegas, NV
http://www.flickr.com/photos/aa440/2245029455/
http://www.flickr.com/photos/aa440/2245029659/
Hilton Trinidad - Port of Spain, Trinidad
http://www.flickr.com/photos/aa440/2245030309/
Thistle Charing Cross - London, England
http://www.flickr.com/photos/aa440/2245825484/
Hilton Park Lane - London, England
http://www.flickr.com/photos/aa440/2254578164/
http://www.flickr.com/photos/aa440/2254578018/
TOP Hotel - Reykjavik, Iceland
http://www.flickr.com/photos/aa440/550396222/