I know if you play an instrument they want to encourage you to do that as it's usually therapeutic. Someone I know had to spend a few days there some months ago, he said after they heard him play the piano there they didn't want him to leave but I imagine that's his musician ego talking.
There were 2 or 3 others on my unit that had electric guitars they were allowed to keep in their rooms but they had to be played unamplified, I didn't play music at the time myself.
Some of the other activities can be enjoyable; in O.T. once they had us make molds of coffee cups and other ceramics that we colored to our liking and after they were fired in the kiln we had our own mugs and ashtrays. Other times we worked with wood and leather. As minors we also had school so that meant Physical Education as well; usually volleyball and basketball, and there was swimming when the weather was warm. They had a jogging path that had different exercise stations at various points that I liked.
Now that I think of it, aside from the meds, the learning curve, the 'language barrier' and reprimands it seemed more like a country club than a hospital, though in a more populated place you might not have that much stuff to do outside
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Let's go on out and take a moped ride, and all your friends will thing your brain is fried, but you can't live your life too dirty, 'cause in the the end you're born to go 30