Hotels and hostels
If you wish to stay outside of the party place (e.g. if you want to sleep in a decent bed =)), here are some choices.
Hostels
You can find a full selection of the hostels in Helsinki and in Finland in general on the web pages of the Finnish Youth Hostel Association.
Hotels
The nearest hotels are
Sokos Hotel Pasila
Located under 800 meters from the party place.
Holiday Inn Helsinki
Located under 1km from the party place
Note: Special Assembly price from Holiday Inn: