From the 1960s onwards Kings Cross also came to serve as both the city's main tourist accommodation and entertainment mecca, as well as its red-light district. It thereby achieved a high level of notoriety out of all proportion to its limited geographical extent. Hundreds of American servicemen on "R & R" (rest and recreation) leave flocked to the area each week in search of entertainment. Organised crime and police corruption were well entrenched in the area – one of Sydney's most notorious illegal casinos operated with impunity for many years, although it was known to all and located only yards from Darlinghurst police station. Much of this activity can be related with Abe Saffron, commonly known as Mr Sin or "the boss of the Cross".