...on the Railroad Pass a few years ago for Gaming times. Interviewed the casino manager who had been there forever. He had the original Gaming License, No 6 if I remember right. No 1 thru 5 are long gone. It is the longest existing gaming license in NV.
Other casinos claim that but it is not true.

The Hoover Dam workers were barred from the place by the construction companies but it didn't stop them.