I've only been to D1, the racetrack and one more place with a big lineup, but I was too drunk to remember where it was.
Big lineup, probably 18 as everyone who visits this place are in awe of the massive number of girls on parade.
Given you are there for 2 weeks, why not try all establishments - East, Sanado, Golden, Rio, etc. - you only live once whilst you can find out which establishment that you would like (since everyone has their own preference).