My take on all this:
Derek was drunk the night before.
He was probably drunk, high, or otherwise still out of it the day of the appointment.
He was certainly drunk as a skunk or as high as a kite when he wrote his response.
(The last time that an escort went to the wrong hotel was when the Sheraton Manhattan and the Sheraton New York used to be located virtually directly across the street from each other on Seventh Avenue years ago. A silly thing for Sheraton to do, but they eventually sold the Manhatten and Sheraton was fortunately removed from the marquee.)