Why don't you come to Poland and barge into some room and demand to know where the frats are? I've never heard of anything remotely like social fraternities (with houses and pledges etc) in Poland and if you were Polish chances are that you would know that.
, if you don't belong to a fraternity, you are a reject and anti-social loner.
I went to a large land grant state university and only a small percentage of students belonged to fraternities (which were essentially rich kid social clubs).