If you have as little as a desk - then folding laundry rack under the desk will do.
If you have nothing but a locker, put a clean change into a Ziploc bag and damp morning clothes into another bag, and wash both at night. In case you live in a humid climate and shammy does not dry overnight you will need another two changes. Every once in a while give your cycling clothes a nice soak in Oxy-Clean to guard against stink and rinse thoroughly. Stuff is high pH and will be pretty hostile to a sweaty skin.
Ride Safe and Have Fun
SF