We had an interesting experience when arriving in PER from DXB on and EK flight. Mr BB and I were ticketed separately, so only I booked the chauffeur drive. No-one phoned me to check any details, and when we approached the driver with my name placard, he was quite shocked there were two of us (but of course there had been no way online or otherwise to let them know of this).
The driver actually went on a bit about how many qualifying passengers are trying to include non-qualifying ones into the journey, and that "wasn't on". Whether that was his policy, or that of the company he is contracted to, I'm not sure. His demeanour was certainly the least professional I have had to deal with of any other driver, but we got home in comfort so all's good.
Oh, and by the way, all the vehicles I have ever been collected in, have been black (or perhaps a dark grey/silver) and have had four wheels and been very comfortable