If you search for hotels through the link provided it enters the promotional code BREAKPKG ( for two people ) in the search results. If there is a qualifying property in the city you are searching it will give you a rate for the bed and breakfast package. If there are no qualifying properties it comes back with an error message.

I found Radisson properties participating in this promo in the UK ( Manchester ) and Belgium ( Antwerp ), there are probably others. But I suspect the majority of participating properties are located in the USA and Canada.