We are going to reserve rooms at Panorama Hotel Heidelberg and Rafaela Hotel Heidelberg. The current plan is to have single rooms but if you prefer sharing a double room with someone, this should be possible as well. You can give a preference which hotel you prefer and if there are other participants with whom you would like to stay in the same hotel.
In order to arrange housing, please write an email to colmar(at)math.uni-frankfurt.de.