While such ignorance of a customer can sometimes be spun into negligence on the part of the server which can actually allow the business to make a legal claim of negligence against the server and seek recompense from the server, I do not agree the patron has a reasonable argument that they may not know they did or didn’t pay. Not only is it unreasonable to argue they simply forgot whether they paid or not, common sense would demand they check into the matter if they somehow weren’t certain whether they paid or not. The only time I can see this as an arguable point is if the patrons are drunk. That doesn’t make th theft ok though.Believe it or not the couple who "dashed" may not have even realized that they did so. If your wife was so busy with the party of 12, that she left the other customers alone for a long period of time, they might not realize that they hadn't paid the bill. They also might have gotten up hoping that it would actually get your wife's attention and then weren't stopped leaving so they just left.
Having waited tables and having also owned a restaurant I can tell you that somebody doesn't get away with dashing unless they are left to their own devices for too long. That can be management's fault for not having enough servers on staff, or it can be the server's fault for neglecting tables.
I understand the points you are making, but I disagree on the issue that someone must be drunk to not realize that they haven't paid. They can also be so engrossed in conversation or each other.While such ignorance of a customer can sometimes be spun into negligence on the part of the server which can actually allow the business to make a legal claim of negligence against the server and seek recompense from the server, I do not agree the patron has a reasonable argument that they may not know they did or didn’t pay. Not only is it unreasonable to argue they simply forgot whether they paid or not, common sense would demand they check into the matter if they somehow weren’t certain whether they paid or not. The only time I can see this as an arguable point is if the patrons are drunk. That doesn’t make th theft ok though.
As to getting up hoping it would gain the attention of the server after which they could pay: that works until they walked out the door if the server didn’t notice them.
I’ve been to restaurants where the server didn’t give me a bill for whatever reason. I’ve gotten up hoping it would garner the attention of the server. When it diddnt I stopped st the front counter or podium and said:
I would like to leave but the server never gave me a bill. Could you get that for me so I can pay and leave. They retrieved the bill. I paid. I left. Never once did I think that if they didn’t stop me it was ok to keep walking.