Out here in California, there are street fairs and crafts shows. At almost all of them, someone is selling big rectangles of Batik fabric, with finished edges. They can be used as bedspreads, picnic blankets, and the girls wear them as sarongs. Some of them have really cool designs and look great hanging on a wall. They don't rip up like posters, they have the whole bohemian thing going on, and they're bigger than posters, so you they fill in a lot of wall space.
And in a pinch, you could be wearing the most-cool toga in seconds.
Try not to go too crazy Tsu, you are there to get an education and a career. There is partying after college, too, ya know.
Shoshana