Hyatt is running a 48 hour sale through 11:59PM CDT tomorrow, Wednesday, October 16, 2013. The sale is valid for stays between October 27, 2013, and February 6, 2014, at select properties in the US, Canada, and the Caribbean. To make a reservation using this offer just enter promotion code C48OCT at the time of booking, or book through this page.
Through this offer you can get up to 30% off the best available/flexible rate, though stays booked through the 48 hour sale are non-refundable.
Only a limited number of properties are participating so I never get too excited about these promotions. If you have a Hyatt stay coming up, though, it can’t hurt to check to see if the property you’re looking at is available at a lower rate through the offer.
(Tip of the hat to @Jimgotkp)