A little background first-
The guy is the oldest child of an out of town family but was learning in a local yeshiva and dating a local girl. He likes the girl and her family but felt that she was not mature enough to get married (she was 19 or 20 at the time but, according to him, acted a couple of years younger).
Before the next date he told the shadchan that he was going home for bain hazimanim but would try to plan something for the interim if applicable. For the date he asked her if she would like to go to a park and have a picnic. She liked the idea but mentioned that she is a vegetarian so he should please bring bagels and cream cheese.
When he arrived home his family was all excited, they knew it “was going to happen” and decided to go to New York to buy new clothing for everyone for the upcoming wedding. He chose not to tell her that he was coming in to town since he didn’t know if he’d be able to fit her into his schedule and he wasn’t about to take her out in the family van.
After a tiring day of driving around Brooklyn and shopping he decided to take his family to Kosher Delight for supper.
Guess who’s eating a hot dog there with her friends?
The guy leads his family in and they start oooing and aaahing as they never saw any Kosher restaurant that size before (did I mention that they are from out of town?). The girl notices the guy, starts to shriek and runs towards the exit. The guy was mortified but pretends he doesn’t know her and walks right by her towards the counter. He turns around to look for his family only to see that they are still standing in front of the door looking all around- still amazed at the size of the place. The poor girl was in tears by that time and could not get by his bewildered family to make her escape.
She later called the shadchan and asked her to ask the guy if she can call and apologize. She did apologize for making a scene but she did not explain the vegetarian thing.
(They are both married now but to other people.)