You will want a souvenir. The useful one is in your wrists. How to hold the knife. How long bread needs. How a room sounds when the right twenty people are in it.
You also keep a private joke with a host. That is worth more than a tote. Next time you book their dining room as a regular, they remember you as the person who showed up and worked.
The social leftover
You might leave with two numbers. You might not. Both outcomes are fine. The night was not a networking mixer. If a friendship starts, it starts because you plated the same service, not because you swapped decks.
The habit leftover
Once you have stolen a Tuesday, the next one is easier. You stop treating joy like a retirement plan. You browse new listings the way other people browse sales. That is the addiction we are comfortable with.
Go once. Then notice how ordinary weekends feel slightly under-seasoned. That itch is the product working.