Mistake? IC Tokyo Bay for under $97.60
Go to onhotels.com look for rooms in country Japan city Tokyo. Set Room Type to Double Room and Currency to US Dollar. Do not use Further Options to whittle down results, and click Search.
Search through results for InterContinental Hotel Tokyo Bay. Click More Room Types and select the most expensive rate, then click Book.
On the right dates (for test try September 25 for one night), the rate on the booking page will show up as $97.60, regardless of the rate you selected in the previous step. You can bring the rate down another 4% by using promo code Aug04.
Seems to work for bookings between September and November that do not include a Saturday night, so might be good for a maximum six night stay.