Hotel IBIS Zentrum
The hotel stay is not included in the registration fee. You are encouraged to book a room in the IBIS Zentrum hotel. The rates will approximately be around63,50 Euro (single room) and 73,50 (double room).The IBIS hotel is next to the central station.
You can find other hotels in Bochum at different categories and prices. Several options are listed below:
Hotel Plaza (http://www.plaza-bochum.de/, ~65 Euro / Night)
Park Inn (http://www.park-inn-bochum.de/, ~120 Euro / Night)
Youth Hostel Bochum (http://www.jugendherberge.de/, B&B ~30 Euro / Night)