The whole thing actually boils down to "education", "upbringing" " graciousness"....by upbringing....I return my trays etc.. anywhere, without being told, reminded etc... & anything else....by education, I have been taught to be gracious..
But, then again, I admit, at times, I do leave trays etc..unreturned for the nasty feeling I get, I am paying "premium" for the cleaners to clear the tables & paying "premium" in GST by spending money on the food & paying "premium" for I am also paying the food sellers, who is paying NEA etc..for employing people or paying for the cleaning services..
My "upbringing", "education" "graciousness", gets thrown out of the windows, for I will leave the tray etc on the table..for I am , what they say in Hokkein " Um gum guang" having to pay "premium" prices...let the cleaners do the work.