I have two thoughts on this.
First, I doubt Kraft went there because he has some Asian child sex slave fetish. He was probably drunk and asked the limo driver to take him somewhere he could get some female attention. The limo driver probably gets a kickback from this place.
Second, there is no way he didn't have a suspicion his girl had been trafficked. I drive past an Asian massage parlor every day there are four reasons I've never stopped in, number two on the list is I think there a high likelihood that some or all of the girls are human trafficking victims and I don't want to be a party to that.
The other three reasons are, I don't want to get caught in a sting, I don't want to cheat on my wife, and before reading about Kraft, I thought they cost a lot more money.