So glad a friend mentioned this place. It's on the third floor of Cosmopolitan, past the sushi resto and down a long hallway lined with old album covers.
I came for lunch, relished in the one person-deep line and had my large cheese slice in hand in no time. For about $5/slice, this is a great destination for after you've shopped/drank/gambled your wad and are looking for some cheesy, greasy comfort.