In Elementary and up until 9th grade I did the bathroom thing and the library. Then I changed schools for high school and it had an open floor plan (some of the rooms didn't have walls and the library was open to the hall ways and other classrooms). I did go to the bathroom a good bit (only place with walls). However, during my Senior year I did hang out in the office a lot. Nope wasn't in terrible but if I was in there the secretary didn't care, the prinicpal didn't come out, and if a teacher saw us (a lot of seniors in there) they either thought it was for a meeting or we had to talk to the principal or we were office workers. Love it when you can hide right in front of everyone.