I don't know, maybe it is only me and I am old enough to remember the old days (I am 63). I have always tip anyone (but not everyone) who provides a (good) service, I mean anyone (if I could afford it, sometimes I was too poor). Busboy, valet, barber, chambermaid (housekeeping), waiter, bartender, shoeshine, busker, doorman, mailman, paperboy, plumber, babysitter, housecleaner, carpet layer, stump grinder, grocery bagger, food deliverer, movers.

TEK