Hyatt Place stays between May 28 and July 5 booked between May 3 and 7 can get up to 30% off the Hyatt Daily rate by using promotion code LTO405. Near IAD, for example, this brings some Hyatt Place hotels down to under $50 per night on weekends. Keep in mind that reservations booked with this code are non-refundable, so you do lose a bit of flexibility. But between the Big Welcome Back and American promotion, this might be worth taking advantage of.
(Tip of the hot nuts ramekin to Patrick)