Decorating A Gym For A Wedding

I did my daughters in a castle motive in a gym using refriderator boxes painted like castle walls. (you can get them free from a refriderator distributor)You could also go the route of faux greek colums made either from cement forms then painted or use tulle strung from the ceiling with white lightes inside. All you do is gather the material at the top and attach to ceiling then let it cascade down and puddle on the floor.