lifting at boarding school

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Hey /fit/, thought you might appreciate my fitness routine for boarding school. I'm in my senior year, and we have our own rooms with limited space but enough for floor exercises and for my main lifting component: my steel frame bed. I was banned from the gym for ankletapping a mate who was squatting and nearly killing both of us in the process (story for another time).
Anyways, on the floor I do bicycle crunches and planks mainly, but I devised a way to use my bed as a weight to lift in various ways.
I usually start off with 10 curls x2, then 15x front rows x3, finishing the set with 15x OBP (over-bed presses) and another 20 of those to finish the pump. Do 3 sets and 4 every other day.
How do you work out with no weights, fit?
>(pic related, similar frame, use middle bar, my bed doesn't have vertical bars)