We can recommend two hotels in Groningen, the Martini Hotel and the Eden City hotel. Hotels in Groningen tend to fill up quickly, so we advise you to book as early as you can. The two hotels, which are very close to each other, are on walking distance from the central train station and the conference site, see Directions.
The rate for the Martini Hotel is 74,50 euro per person per night (for a single room). The Eden City Hotel offers single rooms for 90 euros per person per night and double rooms for 100 euros per person per night. For the Eden City Hotel, guests are asked to mention 'String Meeting' upon making a reservation.