Other Hotel Programs - NH Hotels--any promo codes?

Especially for Germany?

If you have flown Austrian Airlines max 10 days before your stay, there should be a 10% discount for NH hotels in several countries by using the Austrian Airlines Boarding card (http://www.austrian.com/Info/Arrival/MostValuableBoardingCard.aspx?cc=AT&sc_lang=en).

Please report if you have been successful (tried once at check out but was turned away as I "should have ensure discount at time of booking").

Thanks,
David