30 years old boy is looking for accomodation in Warszawa

I am a Czech Phd student of bioinformatics going to work in a lab in Warszawa for two months. I am looking for a separate room or shared room where people usually goes to sleep before midnight. I would like to meet knew people but just accomodation is fine too. I like the asian board game go, chess, Scrabble, Dixit, sport activities (especially running, biking, walking, squash and yoga), photography, reading, movies, Starcraft and talking. I am non-smoking, but have nothing against smokers.