I did this just to see how many unique properties I need before hitting #75 (5 more to go).

Unique Properties:
48 Lex
Albuquerque Airport
Andaz Liverpool Street London
Andaz Peninsula Papagayo
Andaz West Hollywood
Atlanta
Austin
Baltimore/Bwi Airport
Boston Harbor
Calgary
Charlotte Airport
Chicago
Cleveland
Crystal City
Dallas
Dallas/Las Colinas
Denver Airport
Dfw Airport
Dulles
Emeryville/San Francisco Bay
Grand Denver
Grand Dfw
Grand Istanbul
Grand New York
Grand San Diego
Grand San Francisco
Grand Seattle
Grand Singapore
Grand Tampa Bay
Guam
Highlands Inn
Houston
Houston/Greenspoint/Iah Arpt.
Hyatt Times Square
Indianapolis
Jersey City
Kansas City Airport
Las Vegas
Lax El Segundo
Lodge
Monterey Hotel & Spa
Montreal
New Brunswick
North Houston
O'hare
Orlando Airport
Park Milan
Park Washington
Penns Landing
Pittsburgh Airport
Portland Airport
Puerto Vallarta
Rosemont At O’hare
Sacramento
San Francisco
San Francisco Airport
Santa Clara
Schaumburg
Tampa Airport/Westshore
The Bellevue
The Concourse Hotel At Lax
Toronto
Trinidad
Tucson Airport
Uc Davis
Vancouver
Waikiki Beach Resort And Spa
Washington
Ziva Los Cabos
Ziva Rose Hall

Future Unique Properties:
GH/PH Tokyo
Herald Square
... and a bunch of repeats from the list above booked so far.