It's the El Capitan, in Hawthorne. The old interior shots in the Las Vegas Strip casinos had everyone dressed up, the ladies wore dresses and furs, the gents wore suits, etc. These look a little more candid...
I love the guy on the left, with his cigarette hanging out of his mouth

This one looks like it has bits of paper littering the floor under the craps table...
And, aren't those dealer ties great!

Can't imagine too many Vegas Casinos using their chairs to set up a display rack (whatever...) for cut-throat trout from Walker Lake!