During the transition, guests who opt for the older rooms get a «third night free» deal. (travelskills.com)
This offer includes a free third night when you book two nights at regular price. (petergreenberg.com)
Also book Fri - Sat - Sun nights and get 50 % discount on third night excluding Easter, Christmas and all public holiday long weekends. (secretshideawayblackheath.com.au)