I won't go into the details of the arrest, but around 5 years ago before I learned how to properly screen, I found out the hard way that the Hyatt in downtown Houston (4-star) has a special suite around the 15th floor for vice to use for sting operations. Once you realize you have been busted, two detectives come in, ask who dropped you off (with the excuse they need to let them know you are going to jail and will need to be bonded out) only to arrest the person who is doing the drop off with a charge, also.
They then take you via elevator to the basement where they have a special ops room for arresting girls. There is a parking garage where many police cars were parked. If you are doing an outcall, definitely do a drive thru of the parking lot and garages to see what might be lurking around.
I don't know if it's still in use, but as of two years ago, another provider I know of was also set up at the Hyatt in Houston. Her friend who had dropped her off also went to jail.
Be careful ladies and SCREEN, SCREEN, SCREEN!!!