Hello and welcome to the board. Have you tried to wipe the leaves off with a damp paper towel? It's hard to tell but almost looks like alge to me especially on the Pleurothallis allenii? The other orchids may be alge as well. Not sure about the bromeliad.
Hopefully someone else will have other ideas. Try and see of you can wipe green off of the orchids leaves. Were their pots/mounts covered in this?