Not sleeping in strange places definitely depends on how free and independent you are in traveling during your semester/program abroad. During the school week we had great beds, but when traveling everyone in my program slept in train stations, on buses, airports, really anywhere we were when we got tired. Many of us were rushing to get where we wanted to go and trying not to stop needlessly/spend extra money, so we improvised and slept anywhere that was safe. Also, you never know what could go wrong. I slept in a phone booth for part of a night because of full hotels. It was okay though cuz I wandered over to a public house party and got free beer and hilarious company from a lot of intoxicated Germans.