Local transport

If you require local transport within Oslo you can purchase tickets at Ruter's Customer Service Centre which is located in front of Oslo Central Station. Tickets can also be bought in "Narvesen" and "7-Eleven" shops and at ticket machines in the metro stations. More information about public transportation in Oslo can be found Here 
Radisson Blu Scandinavia Hotel and Thon Hotel Slottsparken can be reached by subway, tram or taxi. 

Taxi
Taxis are easily accessible in Oslo city center. Oslo Taxi can be reached on: (+47)22388090

Subway 
All lines going west stops at Nationaltheatret Station. Both venues are within 1 km walking distance from the subway stop. Please see the map below showing the directions to the hotels. 

Walk from Nationaltheatret Station to Radisson Blu Scandinavia Hotel
Exit the train station on Ruseløkkveien, turn left, toward Henrik Ibsens gate, and walk straight through the roundabout. With the park on your left handside, follow Frederiks gate to the end of the park, turn left onto Kristian IVs gate. Turn right onto Holbergs gate. If you are going to Radisson Blu Scandinavia Hotel – continue straight and the hotel is on your right.
If you are going to Thon Hotel Slottsparken continue straight ahead from Kristian IVs gate onto Wergelandsveien. The hotel will be on your right.