regarding what you put on your website - while it's true that SO FAR, no one is bothering with sites that promote "escorts", they can under

1. pimping and pandering
2. living off the earnings of a prostitute (separate charge)
3. conspiracy to commit prostitution

if the sex parties can be shown to be any of those things, your website would be breaking the law. and our current administrations are more likely to try and use something like that to get rid of adult sites, so be very very careful and talk to a lawyer with experience in this area before doing anything.