For booking a hotel in Karlsruhe please see

or other hotel platforms like, or

Here is a short overview (no complete list) of possible options:

 Hotel Erbprinzenhof ***, Erbprinzenstraße
 Hotel Markgräfler Hof ***, Rudolfstraße
 Hotel Hasen ***, Gerwigstraße
 Hotel am Markt ***, Kaiserstraße
 Hotel Berliner Hof ***, Douglasstraße
 Hotel Kübler ***, Bismarckstraße 39-43 
 Hotel Ambassador ***, Hirschstraße 
 Arthotelroyal ***, Kriegsstraße 
 Hoepfner Burghof ***, Haid-und-Neu-Straße
 Hotel Alfa ***, Bürgerstraße
 Hotel Ibis Karlsruhe City **, Poststraße
 Best Western Queens ****, Ettlinger Straße
 Hotel Residenz ****, Bahnhofsplatz
 Schloßhotel ****, Bahnhofsplatz
 Hotel Kaiserhof ****, Karl-Friedrich-Straße
 Novotel Karlsruhe ****, Festplatz
 Hotel Renaissance****, Mendelssohnplatz

Please see this map for locations of the hotels (the venue is close to No. 17).
Most of these hotels are in walking distance or the venue can be reached by tram.

You might also have a look at the hostel in Karlsruhe (20 min. walking +  tram):
Jugendherberge Karlsruhe, Moltkestraße 24,  info@jugendherberge-karlsruhe de .