I mostly gave up on the whole regular thing. It's a hassle to make bookings, especially with girls having patchy availability.
If I'm out west I go to Yoko's and take the next cab off the rank, because they all offer uniformly good service there.
In the city I go to Bellevue 12 and pick anyone good that I know, or anyone old (the older ones give better service and more extras).
Much simpler.