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hi there bbwchatt
the counchsurfers site is great, people from all over the world! its perfect at the moment as a student as it means i can go places cheaply, its like an exchange programme, you offer to meet up with people when they visit your city or they can stay with you and vice versa. i would say that is the one to be recommending to others as its got an easy to follow format, guidelines etc...
thank you again for the recommendation and i should be soon having a place to stay in strasbourg!! i can even go for a few days longer now...