How can you use the plumber idea when a man is standing in your hallway?
If a client arrives and he is smelly, wont shower or is just plain an asshole you tell him to go, hand back the money and say thank you but no thank you, if he gives you lip just make out you are calling your security from the other room.
I agree with fluffyBunny. I offer incalls and I always have a pair of mens shoes at the door when a client walks in, so they are aware/think there is another man in the house. There usually is, but it's a good tip if you are working alone. If they ask who they belong to you can say security, home owner, sub client or whatever you like. Also, I rent out rooms for wg and if nobody is in I offer to put the radio on in the kitchen before I leave. Talk Sport is a good one as it's just talking (no music) and sounds like muffled male voices from a distance.