Changed my car the other week. At the wonder that is CarGiant. They claim to hold the record for the largest car lot in the world, and have the Guinness certificate displayed on the wall behind reception to prove it.
I don't know about that, but they must be in contention for the highest turnover of customers, and most efficient in parting them and their cash.
While I was waiting to pay there were at least 30 people processed thru the system. Sketched a few, as we listened for our name and number to be called.