Janet's place is indeed cosy, and very close to the RAI station & conference centre. She was very welcoming, the tea & coffee are a decent selection (if that's important to you) and the room was warm. As it's snowing at the moment that's quite important.
And if you do have to do a load of work then there is a decent sized table, big enough to lay out drawings or diagrams. For those with a suitcase, there are stairs. It's Amsterdam, there are always stairs!
Thanks again Janet!