I just noticed this thread...
We train in a community center that has been very understanding with us about space, storage and so on -- but we can't put stuff up at all. Which leads to a simple question... Why do you need to display the belts? Give students a hand out, and make them learn the belt structure, instead. Visitors don't need to know that Susie is ranked higher than Billy... They'll either know or the difference is so minor that it won't matter.
We train in a community center that has been very understanding with us about space, storage and so on -- but we can't put stuff up at all. Which leads to a simple question... Why do you need to display the belts? Give students a hand out, and make them learn the belt structure, instead. Visitors don't need to know that Susie is ranked higher than Billy... They'll either know or the difference is so minor that it won't matter.