Visiting Barcelona 8-15/7, San Sebastian 15-18/7

Hey everybody,
We are planning to visit this beautiful city AGAIN. Protected content , then for 4 days to San Sebastian). We = me, my friend (a girl) + one girl, she is studying spanish there.
We would like to meet new interesting people, who could go "sightseeing"/partying with us :)
PS We are coming from Prague, but originally we all are from Saint-Peterburg :)