Don't take a piss and then try to wash your hands if the attendant isn't there. The one time I did the attendant took all the hand towels out when he left. I walked back to the table trying to air dry my hands and some stripper was at the table shaking everyone's hand. I tried to tell her my hands were wet but she insisted on shaking anyway only to look at me like I goo'ed or pissed on them.
She wasn't that hot and I was leaving anyway.