In preparation of my trip to the UK I was browsing through some WG sites on the net. What was very helpful besides the beautiful photo galeries was the "menu" and the rates scedule that most sites post. Girls would through a tick box system select all the services they offer and this is then listed. What I found great is that it would not be necessary for any punter to engage in a lengthy conversation with an SP to establish what services she offers and what her rates are. Just book on-line or by phone and arrive. Many of our SPs find it frustrating and time-wasting to take calls and be interrogated by would be customers and some trolls.
Perhaps this is a great way of addressing this challenge. A punter will know exactly what to expect and the nice thing is if its listed its all in the price for the time slot paid for - no anoying extras.