I just returned from a long trip and on the California Zephyr, we were traveling coach from Helper Utah to Chicago. As soon as we boarded, we notified our car attendant that we would like to upgrade to a sleeper. There were two adults and two 13 yr olds. The conductor came to us and said they only had a bedroom left, but all four of us could have it since they were oversold on coach seats and could use our seats. So, they booked all four of us in a bedroom for an overnight journey (therefore, not non-berth). The dining crew only allowed us three meals, though. It was okay for four during the day but very crowded with the beds made up. My son and I shared the upper berth because the other 13 yr old boy was much heavier than my son. I was amazed that we could both fit in the upper berth, but we did. I can't say it was the best night's sleep I got, but we did get some rest.