Mosaic, the International Section of AYY, organizes various events for the students of Aalto interested in international experiences. This year they organise Mosaic Couchsurfing, a volunteer-based network for accommodation. More information can be found at http://couchsurfing.ayy.fi /. You can also check their Facebook event
If you need a place to stay for a few nights, fill in your application asap! If you got a couch to share do not hesitate to participate in the event as a host!