Starting September, I'm going to need a London hotel room for a couple of nights per week, on an indefinite basis. I'll be paying out of my own pocket.

I'm a Plat, and would obviously like to use *wood if the rates were OK. The choice in London is very limited, and quite upscale. Average (non-rack) rates for the Park Lane seem to run around £175. I'm happy to pay £100 ish, but not much more

Has anyone managed to negotiate a deal direct with a hotel in order to get a discount in return for frequent business (say 100 nights per year)? If so, what kind of discount could I expect?