You can stay 3 nights at the Westin Tokyo for 10K SPG points per night. I did, for valentine's weekend this year. It was wonderful with amenities for elite guests like daily full buffet breakfast (American and Japanese) and free drink and hors d'oeuvre in the evenings all included in the free stay. The service was commendable and there was no tipping! Your points are more "flexible" as SPG points than as airline miles. Or you can stay at the Four Points Hotel in Brussels for 2K (weekend)/3K (weekday) points per night. This hotel has only 125 rooms and the service is very personal and great. You get much better deal and service there than at the Sheraton Brussels (airport and downtown) for 7K per night. There truely are no black out dates worldwide but some locations have high and low season. The Tokyo 10K per night was for low season.