Wyndham Rewards has a promotion “Happy Monday” (are Mondays ever happy?) for their Howard Johnson brand. You can get $25 gas card for reservations that are done on Mondays between August 1 and September 30, 2013, using promotional code SBN and consumed in United States or Canada Sunday to Thursday until October 3.
Note that stays on Friday and Saturday nights are not eligible for this offer. You can access this offer on Howard Johnson’s website here.