The most dreaded customers here in the "Buckle Of The Bible Belt" (Oklahoma) are the big haired evangelists who, after a lavish repast, prefer to leave a Bible card or even deliever a sermon to the struggling waitstaff as a gratuity.
The former drunk, Richard Roberts (Oral's issue) is well known for this practice.
Lucifer has a table waiting for these hypocrites when they go to their, er, reward.
They may be waiting in purgatory a L-ONG time.
"Um. I just died. Is there someone that could see me?"
"I'm sorry, that's not my station."
"Someone will be with you shortly..."
The revenge of the service industry.