Angela,
Yeah they sell these hooks even ones that do not pull off that easily. I had concrete walls in my dorm rooms and those hooks were able to hold up tapestrys. What I did was tie the ends of the tapestry with a piece of string and loop it around the hook. It was a little tricky to get it even, but it held it up forever.
Maybe you could get some pretty lamps in funny shapes. They always add character to a room. Ooooo maybe a disco ball too. Fun fun fun
Jessica