Yes, that's actually very true. However, during winter time you would be playing something like Russian "freeze"ette as it sometimes happen that the heating does not work. The conductors will bring extra blankets but then the party is ruined :) But I must admit, it is one hell of a fun ride.

Oh, guys, believe me...BDZ can only be bad! I had been travelling every day for five years from my home town to the capital (the distance is approximately 40 kilometres). In the winter it is either too cold or so hot that you can't breathe. You usually couldn't get a seat because it was too crowded... Furthermore, there are all those people that never buy tickets and are constantly bribing the conductors...I just hated that!