Originally Posted by
elva
Even if he is... In hospitality industry you smile (with or at him, your choice) and take his money.
Well said.
And even if the client does insult (here not the case), staff member needs to inform manager-on-duty or dismiss client himself, based on householder's rights.
If the client threatens with violence (here not the case), staff member needs to call security, and in a locale with alcohol and guns he must be trained to deescalate!
A staff however who himself threatens a client with violence is obviously uneducated, uncivilized, soon unemployed - and criminal.