@Jwarlow
It is obvious to me that you did not put yourself in that customers position.
Who knows, maybe this “Dad” (on fathers day) who left his family to sit in the car is just a whiny bitch in life, but imagine taking your father out to dinner on fathers day at your restaurant and your father is upset enough to abandon his family during the meal.
High Emotions? YEAH! so you’re gonna have an irate customer.
Your Server screwed this up royally, your inaction at the time of need escalated these emotions.
I am sure that was not just a random choice, they came to your place for a valid reason! (remember, this was Fathers Day!)
I understand being busy,. having a small place and not having someone to properly handle managerial duties for you along with the stresses that go along with it. But a pissed of table of customers is a bomb waiting to explode.
If someone is pleased with a their experience at a restaurant, they tell very few people. You piss someone off, they will tell everyone, even people they may be standing next to in line at the grocery store, then we have all the review sites that are a mouthpiece to every bunghole in the world. That $150.00 could turn into 10 times that amount lost in the coming months.
Now imagine if you reversed the situation by meeting their needs, they may tell a story of a server screwing up badly, but how gracious you were to fix her mistakes(s)
Edited to add;
Heres my situation, maybe you can learn from this. We started as a caterer, and morphed into a restaurant that catered. catering was some very serious coin for us. I had to quit catering because I could not find a trustworthy crew to deliver & serve our catered events properly. So I took the financial hit so I would not be the guy responsible for a wedding not being absolutely perfect.
I had a crew show up late to events 3 times in 1 month, I got reports of bad attitudes, no way in hell will I have those negatives associated with my business even though the revenue generated from catering alone was over $250K in our 3 short summer months