I wouldn't think they did on the major strip casinos, but what about the ones off the strip like on Freemont?
A lot of people believe the El Cortez is. It's one of the few hotel/casinos in Vegas that's still privately owned, and by Kenny Epstein, no less, who started off at Caesars Palace under Jay Sarno. Sarno was connected to Jimmy Hoffa and Allen Dorfman. This is probably the only connection to old Las Vegas on Fremont Street or the Strip.
"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea
