do they deliver pot to hotels in Amsterdam if so is that all of them?

The reason for hash/pot/weed/cannabis/marjuana being available in the Netherlands (under certain conditions) is to manage the issue in a sensible way, but it is not to promote it!

So I may be proved wrong (not touching the stuff, and rarely using hotels as I am local) but I very much doubt it. It's not pizza!

No they will not deliver marijuana or hash to your hotel.All you need to do is go to coffeeshop to get some herb.There are quite a few.And some hotels like Rookies have a coffeeshop next to the hotel.