Carlson Rezidor Hotel Group have a 3-for-2 rate for participating hotels in EMEA region for stays with check-in Friday or Saturday through June 28, 2015. Hotels in Middle East offer this deal for Thursday or Friday check-in.
Use promotional code WBUY2F2 at clubcarlson.com or the hotel brand website.
Radisson Blu Plaza Oslo, Norway is a bit more than 10% savings on the advance purchase rate with a discount from $171.46 to $150.51 USD per night. Rates I found offered penalty free cancellation up to day before arrival.
Some hotels in Europe allow Thursday night arrival with Saturday night free as shown below for Park Inn Lubeck, Germany. Thursday check-in can be a savings for hotels with higher weekend rates since Saturday night is free, regardless of rate on Saturday night.
Park Inn by Radisson Lubeck, Germany
3-for-2 rate discount is a real free night rate for Park Inn Lubeck, dropping rates from 92.33 EUR ($106.14 USD) to 63.33 EUR ($72.81) per night.