Casino Express is a gambling junket airline with a couple of planes or so based out of Elko, Nevada. I think they also have someting out of Memphis going to Cancun as I have seen them down there as well.
Used to be only -200 but I think they might have a -300 not sure. In the past they did their training through STI in Seattle (Simulator Training Inc.), not sure if they still do. You had to pay for your own training which was about 11K. This included 737 Type, 25 hours in 737 line operations, and the hopes of maybe being hired.
If you need more info pm me.