uneeq-
Humph.
Back to the drawing board.
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This isn’t an invention, but a suggestion for improvement:
Valet parking at simchos in Brooklyn usually means street parking, possibly several blocks away.
If the valets had small motorized foldable scooters available, it would increase the range of parking spots they could use and also speed up the cars’ retrieval process after the simcha.
The scooters should be foldable and have electric motors, to minimize noise and mess. They will need to include something to protect the car’s mats in rainy weather.
Another “parking” idea:
A small printer should be available to print out a tiny street map (index-card sized) showing where a guest’s car is, for those who prefer to just go get it themselves when they leave.