[Benjamin Dover]

I suspect she got a gift certificate as a stocking stuffer some time back and tried to cash it in. She was just ignorant about the tip. Maybe she got mediocre service? It does happen in NYC.....or maybe she's just a miser.

"I'll have the fillet mig-non, esparagust with holiday sauce, a ceasar salad with blue cheese, the chocolate mouse... and he'll have the small water....and bring me 11 of those honey-mustard packs. I've also noticed the Sweet and Low and sugar bowl is empty. "

[eureka!]

My guess is miser.