Yesterday, I checked availability at several US Crowne Plazas offering 3rd night free to 30 June. It was called 'Stay on us' or similar. It seemed to be genuine, the total price for 3 nights was close to the cost of 2 nights.

I now want to book a couple of stays and for the life of me I can't remember where I saw the link to the promotion. I've tried ICHotels, CP and other websites as well as an FT search and can't find it. A similar promotion at Sheraton is on the Sheraton website.

Can anybody help me find the CP link, please? Thanks.