I did retirement home training and used to think it was a sweet job. Then I got in the business and underestimated how demoralizing it was as they give you the easy elders in training while the others make you, or at least me, really think of the fact the job just amounts to an unkarmic freebie.
Bathroom attendants - since people got all the high value stuff.
I don't mean people that clean the bathroom etc.
I mean the guy that stands at the sink and makes awkward small talk before handing you a towel you could have got yourself and expects a tip.
EDIT: Y'all I'm pretty sure no one's having sex or shooting up in the bathroom at the fucking Eiffel Tower restaurant in Las Vegas ... Coke - probably. I don't know where anyone else has seen a bathroom attendant, but every place I've seen one at I've been wearing a suit...