EDIT: The list of participating properties below is incorrect. Club Carlson launched this promotion with old list of participating properties. You can find the correct list of participating properties here.
The Club Carlson 50% off award sale is back. You can save 50% of the usual number of points required at the select properties in EMEA. This offer is valid for bookings made between October 29, 2012 and March 30, 2013. The offer is valid for stays from November 1, 2012 to March 31, 2013.

You can make the booking using the Club Carlson’s website, but you need to have promotional code 50REDEEM on the promotional code field to bring up the discounted rates. (Please note that this offer is bookable from 29th of October)

This offer is valid only for standard awards and doesn’t apply for Points + Cash bookings (and presumably also for Premium Room Rewards).
There are few Radisson Blu hotels that caught my eye on this list:
Radisson Blu Hotel Baku

Hotels in Azerbaijan tend to be on the expensive side due to the oil boom.
Radisson Blu Hotel Addis Ababa

Many of the international aid and NGO’s have their African HQ’s in Addis Ababa and the hotels then to be rather expensive there as well. I have transited through Addis Ababa twice after Ethiopian joined the Star Alliance, but haven’t yet spent a night in the city
Radisson Blu Hotels in Norway

Norway is very expensive country due to the strength of their currency. Saving 50% off the awards could make it somehow bearable.
Radisson Blu Royal Suite Hotel Jeddah

I was looking at options for hotels in Jeddah the other day as I was planning on having a long transit there early next year. All the hotels are $200++.
Radisson Blu Hotel St Gallen

I have been to Switzerland few times but never to St Gallen. Saving on award cost might make me to go there early next year.
Conclusion
Personally, I really like using points when programs are having award sales. You always need to consider the price of the hotel and how many points you would earn if it would be a paid stay.
Here’s a list of participating hotels:
AUSTRIA
Park Inn by Radisson Linz Normally 38K – during the sale 19K per night
AZERBAIJAN
Park Inn by Radisson Azerbaijan, Baku Normally 44K – during the sale 22K per night
Radisson Blu Plaza Hotel, Baku Normally 50K – during the sale 25K per night
BELGIUM
Park Inn by Radisson Antwerp Normally 44K – during the sale 22K per night
Park Inn by Radisson Leuven Normally 44K – during the sale 22K per night
Radisson Blu Astrid Hotel, Antwerp Normally 44K – during the sale 22K per night
Radisson Blu Park Lane Hotel Normally 44K – during the sale 22K per night
ETHIOPIA
Radisson Blu Hotel, Addis Ababa Normally 44K – during the sale 22K per night
FRANCE
Park Inn by Radisson Lyon Ouest Normally 38K – during the sale 19K per night
GERMANY
Park Inn by Radisson Stuttgart Normally 38K – during the sale 19K per night
Radisson Blu Gewandhaus Hotel, Dresden Normally 44K – during the sale 22K per night
Radisson Blu Park Hotel & Conference Centre, Dresden Radebeul Normally 28K – during the sale 14K per night
HUNGARY
Radisson Blu Beke Hotel, Budapest Normally 28K – during the sale 14K per night
IRELAND
Radisson Blu Hotel, Letterkenny Normally 28K – during the sale 14K per night
LITHUANIA
Park Inn by Radisson Kaunas Normally 9K – during the sale 4.5K per night
NETHERLANDS
Park Plaza Amsterdam Airport Normally 38K – during the sale 19K per night
Park Plaza Eindhoven Normally 44K – during the sale 22K per night
Park Plaza Utrecht Normally 44K – during the sale 22K per night
NORWAY
Radisson Blu Hotel Norge, Bergen Normally 44K – during the sale 22K per night
Radisson Blu Hotel, Alesund Normally 44K – during the sale 22K per night
Radisson Blu Royal Hotel, Bergen Normally 50K – during the sale 25K per night
POLAND
Radisson Blu Hotel, Gdansk Normally 38K – during the sale 19K per night
Radisson Blu Sobieski Hotel, Warsaw Normally 28K – during the sale 14K per night
RUSSIAN FEDERATION
Park Inn by Radisson Astrakhan Normally 28K – during the sale 14K per night
Park Inn by Radisson Donetsk Normally 28K – during the sale 14K per night
Park Inn by Radisson Rosa Khutor Normally 38K – during the sale 19K per night
Park Inn by Radisson, Kazan Normally 28K – during the sale 14K per night
Park Inn by Radisson, Pulkovskaya St Petersburg Normally 28K – during the sale 14K per night
SAUDI ARABIA
Radisson Blu Royal Suite Hotel, Jeddah Normally 44K – during the sale 22K per night
SPAIN
Radisson Blu Resort, Gran Canaria Normally 50K – during the sale 25K per night
SWEDEN
Radisson Blu Hotel, Malmo Normally 44K – during the sale 22K per night
Radisson Blu Royal Park Hotel, Stockholm Normally 44K – during the sale 22K per night
SWITZERLAND
Park Inn by Radisson Lully Normally 38K – during the sale 19K per night
Radisson Blu Hotel, St. Gallen Normally 50K – during the sale 25K per night
UKRAINE
Radisson Blu Resort Bukovel Normally 38K – during the sale 19K per night
Radisson Resort & Spa, Alushta Normally 44K – during the sale 22K per night
UNITED ARAB EMIRATES
Park Inn by Radisson Abu Dhabi Yas Island Normally 28K – during the sale 14K per night
Radisson Blu Hotel, Abu Dhabi Yas Island Normally 38K – during the sale 19K per night
UNITED KINGDOM
Park Inn by Radisson Aberdeen Normally 38K – during the sale 19K per night
Park Inn by Radisson Bedford Normally 28K – during the sale 14K per night
Park Inn by Radisson Doncaster Normally 15K – during the sale 7.5K per night
Park Inn by Radisson Manchester Victoria Normally 38K – during the sale 19K per night
Park Inn By Radisson Northampton Normally 28K – during the sale 14K per night
Park Inn by Radisson Rotherham No longer Park Inn
Park Inn by Radisson Telford Normally 15K – during the sale 7.5K per night
Radisson Blu Hotel, East Midlands Airport Normally 38K – during the sale 19K per night
Radisson Blu Hotel, Liverpool Normally 38K – during the sale 19K per night
Here are the terms and conditions of this offer:
This 50% off Award Night offer (“Offer”) is available to Club Carlson members only at participating Radisson Blu, Radisson Blu Edwardian, Park Plaza, and Park Inn by Radisson hotels in Europe, the Middle East and Africa for Award Night bookings made between 29 October 2012 and 30 March 2012 for stays beginning 1 November 2012 and completed no later than 31 March 2013. The Offer must be booked using your Club Carlson member number and promotional code 50REDEEM at clubcarlson.com or by phone with Member Services available at +44 207 949 0378. This Offer reduces the number of Gold Points normally required to be redeem for a standard Award Night by 50%, as determined by the applicable hotel redemption category. The Offer is valid for standard room Award Nights only and is subject to availability. Points + Cash bookings are not eligible for this Offer. This Offer, and your membership in Club Carlson, is subject to all Club Carlson Program Terms and Conditions; if you are not a member, enroll at clubcarlson.com. The Offer is not valid for existing reservations. We reserve the right to add, modify, or discontinue this Offer with or without notice. Offer is void where prohibited by law. By booking the Offer, you agree and consent to these terms and conditions.