Read this in another thread, cannot remember which one.
Since Hyatt has removed the ability to search for P&C rates at all Hyatts in a city (you now need to search each hotel individually)... by entering code 51440 will show up all hotels with P&C availability! you'll recognize them when the respective rate (50$, 75$, 150$, etc) shows.
Great! tried it out and it really does work.