An escort on Tverskaya is rarely standing on the avenue itself. The hotels face the traffic, and the flat is usually one turn into a side street where a car can stop for a minute and not stay.
Saying Tverskaya without the side street sends the car to the Kremlin end or the Belorussky end, and those are not the same evening. The door number belongs in the first message.
Also in Moscow: Patriarch Ponds after nine and Arbat side streets.