It's the Sheraton FRAport. They seem to have some sort of deal with the airlines.

Their staff is amazing, btw. When we were finally leaving FRA, LH was supposed to send someone from their disability services to help us. We waited and waited and no one came. The Sheraton people had one of their bellhops accompany us through the airport to check our bags. Bless that man. As we headed to the Business Class line, he said, "No. My guests are all First Class," and steered us to the First Class check-in, where he had a couple of friends, gave them our bags, and they cheerfully checked us in. He then accompanied us to the disability services office, where he gave them a bit of a Germanic scolding.

We gave that bellhop a rather generous tip, to say the least. Nice man.

The "generally not for weather" bit may well be true in some parts of the world, but in the European Union airlines HAVE TO provide accommodation to passengers who are delayed overnight, regardless of the reason for the delay - all part of EU261/2004. This applies to EU carriers anywhere in the world, and to non-EU carriers when departing from the EU.

So - if you're stuck in FRA, LHR or AMS overnight the airline HAS TO pay for your hotel - they can't get out of it.