The Dunes Hotel (or the Dunes) was a hotel/casino, built in 1955, located in Las Vegas, Nevada on Earth. In the holosuite program Bashir 62, a rendition of 1962, the Dunes was one of the biggest venues along the Vegas Strip.
Following the hostile takeover of his lounge by Frankie Eyes, Vic attempted to get gigs at other local casinos including the D.I., the Sands and the Dunes. None of them returned his calls. (DS9: "It's Only a Paper Moon")