I didn't ask you for an example of something that MIGHT fit your theories, according to your theories. I asked you for an example of something that DID, in the past.
You yourself said that your pizzaria workers would have extra money to spend and they're not spending that money on student debt - so what would your pizza workers spend their money on? If they spend it on rent in nicer places to live, now your town has landlords getting a pay rise. If they spend it on something new entirely, those former pizza workers who got fired now have a chance to break into that new market, selling to their former colleagues or (more likely) moving to larger markets where people are earning more because their pay went up.
That's why I'm asking you to point out when - IN THE PAST - minimum wage directly caused a drop in employment rate.
Your pizzaria might cut its staff in half at first, but the number of customers visiting your pizzaria has not changed and might even have increased because now, your pizzaria staff are actually able to afford the very pizza they make and serve. After a few months of TRYING to run the pizzaria with less staff doing more, exhaustion sets in, staff start leaving, and the owner starts to get desperate and starts offering more to attract workers to relieve the labor issues - doing, at last, what they should have done from the beginning: pay their workers a living wage from the start. Or they could close their business, and an entrepeneur who can run the pizzeria at a profit while paying its staff decently could step in their place.
And I write this not as a fanstasy, but relaying to you how the market responded to a raise in the minimum wage EVERY TIME THIS HAS BEEN DONE. Minumum wage has NEVER caused inflation and has never crashed the labor market - that is a Charlie Brown Football fallacy, as y'all tell us "but NEXT time, raising the minimum wage will lose jobs!" hoping that we just don't know enough about economics to notice that it doesn't and wouldn't.
$15 an hour is exactly what workers were paid in the 1960's if you correct for inflation. In effect, your pizzaria workers have been taking a long series of pay cuts for 60 years, and there is no market reason to justify this. If a pizzaria could run in the 60's, there's no reason a pizzaria couldn't run now with a $15/hr minimum wage.