In my early days as a CPL I was given a charter into Royal Ascot. Returning to collect my PAX after the racing the radio conversation went something like this.
FB: Jockey** Finals
ATC: Jockey** gate 2, we're locating your passengers.
.......
ATC: Jockey** your passengers are not here. Air taxi to parking next to the 109s.
FB: Jockey** Air taxi parking.
.......
ATC: Jockey** they're not the 109s they're the Dauphins.
FB: Ohh, Err, which ones are the 109s?
ATC: They're the white ones!