Slightly cheekily, they are advertising it as “Stay 3 Nights, Get a Free Night”.
However, that is not technically true. What they are actually offering you is 38,000 bonus Club Carlson points for completing three nights during the period.
This could be better or worse than a free night! Should you want to visit the Park Inn in Rotherham, for example, 38,000 points will get you four free nights!
If you want to stay at The May Fair in London, their poshest property in the UK, it will cost you 50,000 points per night. (To be fair, with the base points from your three nights, plus the 1,000 points online booking bonus, you would have earned close to 50,000 points in total from your three nights anyway.)
In general, I value Club Carlson points at £5 per 1,000. This means that you are effectively getting a £190 bonus for completing three nights. At a super-cheap property, this might (but I stress might) make a mattress run over a cheap weekend worthwhile.
Compared to the other hotel promotions currently being run by the big chains (see my list here), this is probably the most generous. If you can arrange your business travel to take in Radisson, Park Plaza or Park Inn properties this Spring, I think you will find it worthwhile.
(To see our complete list of all current hotel promotions for the major chains, click here to visit our ‘Hotel Promos’ page or use the link in the menu bar at the top of the page.)