Took $500 thinking that would be plenty, but got me a 15 minute quickie no oral. Think oral alone was $400 and half and half (oral and sex) was $600.
You get shown around the various suites in the house, then have a line-up where you can't talk to any of the girls. You then have to select a girl, and you then go into a room and negotiate. Whilst you negotiate, there is a microphone turned on, the girl then takes the cash then comes back and microphone turned off.
She told me that when she came back, and explained that you should always go for the lowest price option then negotiate further with the girl when they come back as the cash will then go 100% to the girl so they're much more flexible. Unfortunately I wasn't expecting such high prices so only had a few more dollars so was in no position to negotiate further.
There's also a bar, I think the better option would have been to sit in the bar for a while and chat to girls directly there, get the impression that was for the locals and the line-up experience was to fleece the tourists.
Oh, and you have to have a dick inspection by the girl before anything commences which is more like a medical check-up, very surreal experience but one to tick of the list.