Hi Edi,
Good idea. I just phoned him and he's interested. He even offered to provide a room at the university and to contact some other Lispers like Ralf Moeller of Lisp Machine Museum fame.
Sounds good.
I'm afraid finding a date for the next meeting will be harder than I thought. I should have checked the rooms first. Sorry for that.
You could consider doing what I did in Amsterdam: just pay for a room in a hotel somewhere and split the costs among the participants.
Arthur