I've hooked up with escorts 2x at encore. it is not as easy as say vegas but there are some available. Once I was at the bar and put my room key on the bar next to my drink and was approached by a lovely well dressed latina. we made agreements and agreed on a price and went to my room. I made sure money exchanged hands behind closed doors.  

Another time I spotted an obviously lady of the evening walking the casino floor. i approached her to offer to my her a drink. she said she didn't have time but took my number and texted me later for a rendezvous.