I created www.discreeteencounters.com about a year ago. I created it to be very similar to another site I liked a lot but am no longer a member of. It utilizes a vouch system and vouch forms are required for any member you intend to vouch. You will not be able to vouch until you are fully vouched and moved into the appropriate vouched user group yourself. Reviews are hosted on the site in the appropriate review forums. Only summary reviews are visible to non vouched members. I have a chat link on the board but could not seem to get a good chat installed
There is a provider only section which only vouched providers have access to and vice versa for clients. There is only one public discussion forum called the discussion board. This way members from all over the place can participate and interact if they choose to. Ads can be placed in the appropriate ad forums once provider status is granted.
You are more than welcome to check it out.