In addition to using the Sport of Kings location, they also used the front entrance to the Landmark (long after it was closed, but before it was imploded, obviously). The entrance (glass doors and a few broad steps if I recall) was spiffed up and lighted, and they posted a "The Tangiers" sign to the right of the doors. Used in one of the scenes to show an arrival at the fictitious casino, I think...though it's been a while since I saw the movie.

(I was in town when the movie was being made and saw this odd sign on the Landmark. Didn't know till the movie came out what the connection was.)