We did a late ADR a few years back to Bistro de Paris in WS. We finished up around 11PM - well after park close. There was another table finishing up at about the same time. They never rushed us in any way.
We got to walk out by ourselves - WS was absolutely empty, the themed music still played, it was a great walk. As we passed the entrance into FW we saw a monorail going the wrong direction - they were taking it off the Epcot loop for the night. At the Main Gate, the CMs asked us where we came from (they knew there were 2 parties at BdP and 1 at Alfredos), and where we were going. They sent us to the bus stop, and 5 minutes later a bus pulled up to take us (just us) back to our hotel.
We count that evening as one of our best WDW experiences!