Right now there is nothing to promote. Properties are selling out on revenge travel and weddings, naming their prices at levels that would have previously elicited a gasp.
As noted above, a combination of macro factors (e.g. commodity shocks, equity market downturns, fed action) could potentially elicit a need for a kick-start. But I wouldn't expect that to happen for at least a quarter or two - I'd think that most travel that has already been locked in through summer is considered by the travelers to be a sunk cost (even if not prepaid) and the hotels will realize that revenue.