Translation of Schweinerei

Clara agreed about a month ago to give me her acquaintances' contact details from NYU and Columbia. I have just spoken to her now and she told me that you could help me and send me those files.
They wanted to know everything about relationships in Switzerland. One of the asked me of how guys propose friendships to girls. I did not know what she meant and explained that we were very informal.
We spent the entire day doing nothing, just waiting for the night train which would take us into the northern mountain area of Vietnam, close to the Chinese border. The train left at around ten.