what does "abandon the pretense"mean?
That Friday Ruby, having abandoned the pretense that he had been entitled to attend the conference, was busy handing out cards giving officers free privileges at his two striptease establishments. The cards were wordlessly pocketed. The policemen saw nothing improper in this. Like their District Attorney, they knew Jack, and when off duty they frequently dropped into the Vegas or the Carousel in mufti, occupying reserved seats and consuming free setups—usually rye and 7-Up, the wine of that strange country—while hoarsely urging mascaraed women to peel off black net lingerie. One thirty-year-old detective, August Eberhardt, had been acquainted with Ruby for five years.