LAS VEGAS -- Planet Hollywood was warned. “Sin City” is just a nickname, and shouldn’t be taken literally when it comes to Las Vegas nightclubs.

The crackdown on illegal activity at Prive nightclub inside Planet Hollywood came three months after the Gaming Control Board issued a warning that companies will be punished for looking the other way when it comes to crimes such as prostitution and drug use.

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Planet Hollywood owners agreed to pay a $750,000 fine after the Gaming Control Board found numerous violations at Prive. The club is owned by the Opium Group and leases the space inside the resort.

Regardless, gaming officials said that doesn’t make Planet Hollywood any less responsible.

The Gaming Control Board issued its complaint to FOX5 Monday.

Among the most serious complaints was that drug use was prevalent inside the club, and gaming officials said there have been accusations that Prive employees have assaulted customers, both physically and sexually.

Some of the accusations date back to as far as 2006, and the club had been cited by Clark County in March 2008 for allowing topless or lewd activity among customers.

Nightclub management was also accused of tossing out drunken customers and leaving them unattended in the Planet Hollywood casino, sometimes in “various states of consciousness.” Gaming officials cited a large number of customers who had been extremely intoxicated and needed to be hospitalized.

Planet Hollywood management should have done something about the problem, officials said.

Neither the Opium Group nor Planet Hollywood has returned FOX5’s request for a statement on the accusations.

Much of the evidence gathered by the Gaming Control Board comes from an analysis of calls to Las Vegas Metro police and the Clark County Fire Department.

In the 12 months that followed the club’s opening in November 2006, emergency crews responded to 61 calls that included reports of overdose, rape and traumatic injuries.

In 2007, police also responded to 52 reports of assault or battery, along with reports of fighting, guns and prostitution.